A comfy, hearty mushroom potato casserole that wants simply 1 pan. Layers of wealthy mushroom gravy with beans and veggies, layered with crisp garlic herb potatoes that take solely minutes to place collectively because the oven does all of the work. (gluten-free with soy-free and nut-free choices)

It’s fall, and it’s time for some consolation meals. And what’s extra comforting than this casserole, which has a stewy mushroom gravy with beans and veggies, topped with potatoes smothered in garlic butter? There are numerous fall herbs, like recent thyme and sage, and all of it comes collectively actually rapidly.


This is a brilliant straightforward one-pan casserole. No have to sauté or stand across the kitchen for lengthy intervals of time cooking the onions and mushrooms. Everything goes proper into the baking dish, and the oven does all of the work.
Once the mushroom and onions are cooked, add the beans, herbs and stew substances and prime them with some sliced potato and bake, and thats it. You get all the autumn flavors and a dish that reminds of mashed potatoes and mushroom bourguignon w/o all of the work.
It’s comforting, stewy, and ideal for a fall dinner with your loved ones, served with a facet salad, garlicky dinner rolls, or some crusty bakery bread. Or serve it nonetheless else you want!


Why You’ll Love Mushroom Potato Casserole
- cozy, hearty, stewy beans and veggies in a wealthy, mushroom gravy
- 1-pan oven recipe, no standing on the range!
- little or no energetic cooking time
- No cooking the aromatics and potato individually
- naturally nut-free with straightforward gluten-free and soy-free choices


For the Mushrooms and Onion Layer
For the Stew
- 1 tablespoon recent thyme, or ¾ teaspoon dried thyme
- 1 teaspoon garlic powder
- 1 teaspoon onion powder
- ¼ teaspoon salt, or extra, to style
- ½ teaspoon sage
- 2 teaspoons tomato paste
- 1 tablespoon soy sauce, or tamari or coconut aminos
- ¼ cup chopped celery
- 15 ounce can of white beans, drained, comparable to cannellini, nice northern, or butter beans, or 1 1/2 cups cooked white beans
- 1½ cups inventory, or extra, if wanted
- 2 teaspoons cornstarch, or flour
For the Potato-Garlic Butter Layer
Prevent your display from going darkish
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Preheat the oven to 410°F (210°C), and grease a ten×13” or similar-sized baking dish. Chop all of your veggies, and grease your baking dish. Slice off about 1/3 from the highest of the garlic bulb, in order that the cloves are uncovered. Reserve the small items of garlic cloves from the highest third.
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Add the reserved small items of garlic (peeled) together with the mushrooms, onion, and carrots, 2 teaspoons of the olive oil, and the salt, pepper, and purple wine to the baking dish. Mix effectively to coat, and unfold the veggies out evenly. Make some house within the middle of the dish, and place the garlic bulb, cut-side-up, within the center. Drizzle the remaining olive oil over the uncovered cloves. Cover your complete dish with a sheet of parchment paper, letting it relaxation loosely excessive.
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Bake for about 40 minutes, or till the mushrooms are al dente and beginning to flip golden, and the onions are translucent or beginning to flip golden. Check on the 30-minute mark, and stir if something appears to be scorching. The mushrooms will normally launch loads of moisture, but when the pan is drying out, add a splash of additional inventory at that time.
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Remove the dish from the oven. Take out the garlic bulb, and set it apart to chill. Add all of the herbs, salt, tomato paste, and soy sauce to the baking dish. Mix effectively, urgent the tomato paste into the combination, so there are not any clumps. Stir every part collectively till evenly coated. Add the celery and beans, then combine the cornstarch or flour into the inventory and pour it into the pan. Stir effectively to coat, and unfold the combination evenly with a spatula. Arrange the sliced potatoes on prime of the bean stew combination, overlapping them barely.
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Squeeze the scrumptious roasted garlic cloves from the bulb right into a small bowl. Add the vegan butter or olive oil, oregano, lemon juice, and a pinch of salt, if utilizing oil. Mash and blend till creamy, then unfold dollops of this garlic butter over the potatoes and easy calmly. Reserve a bit of the combination for serving later, if desired.
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Cover the dish once more with parchment and bake for 20 minutes. Remove the parchment and proceed baking for an additional 20 to 25 minutes, or till the potatoes are tender and golden on prime. Brush the completed potatoes with the reserved garlic butter. Sprinkle with recent herbs, like parsley or basil, earlier than serving. Serve this scrumptious stew as-is or with a facet salad, dinner rolls, or toasted sourdough.
Storage directions
Baked casserole may be saved within the fridge for 3 days. Reheat within the oven or microwave. Potatoes are greatest when they’re freshly cooked, so if you wish to make it forward, make it as much as the step for w/o the potatoes. Cover the baking dish and refrigerate for as much as three days. Top with peeled and sliced potatoes and bake when able to serve.
Calories: 358kcal, Carbohydrates: 68g, Protein: 13g, Fat: 5g, Saturated Fat: 1g, Polyunsaturated Fat: 1g, Monounsaturated Fat: 2g, Trans Fat: 0.3g, Sodium: 684mg, Potassium: 1650mg, Fiber: 8g, Sugar: 5g, Vitamin A: 2019IU, Vitamin C: 21mg, Calcium: 109mg, Iron: 5mg
Nutrition data is mechanically calculated, so ought to solely be used as an approximation.


Ingredients
- veggies – For the mushroom-onion layer, you will want mushrooms, onions, carrots and a complete head of garlic. For the stew and topping, you want celery and potatoes.
- olive oil and/or vegan butter – To assist the veggies roast and to make the garlic butter topping.
- purple wine – If you don’t need to use wine, you need to use a combination of balsamic vinegar and vegetable inventory.
- herbs and spices – We are utilizing recent or dried thyme, dried sage, dried oregano, garlic powder, onion powder, salt, and pepper. You can even prime the casserole with recent parsley and/or basil for much more taste.
- soy sauce – For gluten-free, use tamari, and for soy-free, use coconut aminos or extra wine.
- beans – Use white beans of selection, like cannellini, nice northern, or butter beans.
- inventory – Makes the gravy within the baking pan.
- cornstarch – To thicken the gravy. You can use flour as an alternative, when you favor.
- lemon juice – For moisture and tang within the potato topping.
💡Tips
- To cut back the prep time, chop the celery and slice the potatoes whereas the mushroom-onion combination is baking.
- When you slice the highest off of the garlic head, there can be small items of garlic in that prime third. Add them to the mushroom combination for extra taste.
How to Make Mushroom Potato Casserole
Preheat the oven to 410°F (210°C), and grease a ten×13” or similar-sized baking dish. Chop all of your veggies, and grease your baking dish. Slice off about 1/3 from the highest of the garlic bulb, in order that the cloves are uncovered. Reserve the small items of garlic cloves from the highest third.
Add the reserved small items of garlic (peeled) together with the mushrooms, onion, and carrots, 2 teaspoons of the olive oil, and the salt, pepper, and purple wine to the baking dish. Mix effectively to coat, and unfold the veggies out evenly. Make some house within the middle of the dish, and place the garlic bulb, cut-side-up, within the center. Drizzle the remaining olive oil over the uncovered cloves. Cover your complete dish with a sheet of parchment paper, letting it relaxation loosely excessive.
Bake for about 40 minutes, or till the mushrooms are al dente and beginning to flip golden, and the onions are translucent or beginning to flip golden. Check on the 30-minute mark, and stir if something appears to be scorching. The mushrooms will normally launch loads of moisture, but when the pan is drying out, add a splash of additional inventory at that time.
Remove the dish from the oven. Take out the garlic bulb, and set it apart to chill. Add all of the herbs, salt, tomato paste, and soy sauce to the baking dish. Mix effectively, urgent the tomato paste into the combination, so there are not any clumps.
Stir every part collectively till evenly coated. Add the celery and beans, then combine the cornstarch or flour into the inventory and pour it into the pan. Stir effectively to coat, and unfold the combination evenly with a spatula.
Arrange the sliced potatoes on prime of the bean stew combination, overlapping them barely.
Squeeze the scrumptious roasted garlic cloves from the bulb right into a small bowl. Add the vegan butter or olive oil, oregano, lemon juice, and a pinch of salt, if utilizing oil. Mash and blend till creamy.
Spread dollops of this garlic butter over the potatoes and easy calmly. Reserve a bit of the combination for serving later, if desired.
Cover the dish once more with parchment and bake for 20 minutes. Remove the parchment and proceed baking for an additional 20 to 25 minutes, or till the potatoes are tender and golden on prime. Brush the completed potatoes with the reserved garlic butter.
Sprinkle with recent herbs, like parsley or basil, earlier than serving. Serve this scrumptious stew as-is or with a facet salad, dinner rolls, or toasted sourdough.
What to Serve with Mushroom Potato Casserole
Serve this scrumptious stew as-is or with a facet salad, dinner rolls, or toasted sourdough.
Frequently Asked Questions
Mushroom potato casserole is of course nut-free, so long as you employ nut-free vegan butter or use oil.
For gluten-free, use cornstarch as an alternative of flour and tamari as an alternative of soy sauce.
To make it soy-free, guarantee that your vegan butter is soy-free, and use coconut aminos or further wine as an alternative of the soy sauce.
Yes, you may.
Bake the mushroom, add the stew substances after which retailer that baking dish for as much as three days. When you might be able to serve, add peeled and sliced potatoes and bake.
