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One-Pot Comfort Food

One-Pot Savory Lentil and Mushroom Pot Pie

By PanPotPlates Test KitchenReviewed by PanPotPlates Editorial TeamPublished Apr 16, 2026 · Updated May 11, 2026
British-Inspired 65 mins onepotcomfortfoodvegetarianfamily-friendlyheartyeasybudget-friendlyfreezablemealprepleftovers

This easy one-pot savory lentil and mushroom pot pie offers a cozy, protein-packed vegetarian meal with a flaky golden biscuit crust. Ideal for quick family dinners, make-ahead meal prep, and freezer-friendly leftovers.

One-Pot Savory Lentil and Mushroom Pot Pie
Prep 15 min
Cook 50 min
Total 65 min
Servings 6
Difficulty easy
Cuisine British-Inspired

Recipe Details

Prep15 min
Cook50 min
Total65 min
Servings6
Difficultyeasy
CuisineBritish-Inspired
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Ingredients

Servings 6
  • 2 tablespoons olive oil
  • 1 large yellow onion, diced
  • 3 cloves garlic, minced
  • 3 medium carrots, diced
  • 2 celery stalks, diced
  • 10 ounces cremini mushrooms, sliced
  • 1 teaspoon dried thyme
  • 1 teaspoon dried rosemary
  • 1/2 teaspoon smoked paprika
  • 1 cup dried brown or green lentils, rinsed
  • 3 cups vegetable broth
  • 1 tablespoon tomato paste
  • 2 tablespoons all-purpose flour
  • 1 cup frozen peas
  • Salt and freshly ground black pepper, to taste
  • For the biscuit topping
  • 2 cups all-purpose flour
  • 1 tablespoon baking powder
  • 1 teaspoon salt
  • 6 tablespoons cold unsalted butter, cubed
  • 3/4 cup whole milk
  • 1 egg, beaten (for egg wash, optional)

Instructions

  1. Heat olive oil in a large oven-safe pot or Dutch oven over medium heat.
  2. Add diced onion, carrots, and celery. Sauté for 6-8 minutes until vegetables soften.
  3. Stir in minced garlic, sliced mushrooms, thyme, rosemary, and smoked paprika. Cook for another 5 minutes until mushrooms release moisture and begin to brown.
  4. Sprinkle flour over the vegetable mixture and stir well to coat. Cook for 1 minute to eliminate raw flour taste.
  5. Add rinsed lentils, tomato paste, and vegetable broth. Stir to combine, scraping up any browned bits from the pot’s bottom.
  6. Bring to a boil, then reduce heat and simmer uncovered for 25-30 minutes, until lentils are tender and filling is thickened.
  7. Stir in frozen peas and season with salt and pepper. Remove from heat.
  8. Preheat oven to 425°F (220°C).
  9. In a medium bowl, combine flour, baking powder, and salt for the biscuit topping.
  10. Cut in cold butter using a pastry cutter or fingers until mixture resembles coarse crumbs.
  11. Gently stir in milk until just combined; dough will be sticky.
  12. Drop spoonfuls of biscuit dough evenly over the lentil and mushroom filling to cover the surface.
  13. Optional: brush biscuit topping with beaten egg for a glossy golden finish.
  14. Transfer the pot to the oven and bake for 15-20 minutes, until biscuits are puffed and golden brown.
  15. Let cool for 5 minutes before serving to set the filling.
  16. Enjoy warm. Store leftovers in an airtight container in the fridge for up to 4 days or freeze for up to 3 months.

Frequently Asked Questions

Reader questions and answers for this recipe will appear here.

If ingredient substitutions are needed to suit dietary preferences or pantry availability, consider these options while maintaining the recipe’s hearty, vegetarian and family-friendly nature:

  • Lentils: Substitute brown or green lentils with red lentils for faster cooking, or canned lentils for convenience. Black beans or chickpeas offer alternative textures and flavors.
  • Mushrooms: Swap cremini mushrooms with button, portobello, or shiitake mushrooms to vary earthiness and richness.
  • Vegetable Broth: Replace with mushroom broth or low-sodium vegetable broth to better control flavor and salt content.
  • All-Purpose Flour: Use gluten-free all-purpose flour blends for both thickening and biscuit topping to make the dish gluten-free.
  • Milk: Substitute whole milk with unsweetened plant-based milks like oat, almond, or soy for dairy-free options. Use flaxseed or chia egg replacers for the optional egg wash to keep it vegan.
  • Butter: Vegan butter or coconut oil replacements work well to maintain richness for dairy-free and vegan diets.
  • Frozen Peas: Swap peas with fresh peas, green beans, or chopped spinach to add variety in green vegetables.

These substitutions help preserve the recipe’s accessibility, budget-friendliness, and comforting one-pot simplicity while accommodating vegetarian, vegan, gluten-free, and dairy-free diets.

Pan Or Pot Required

This One-Pot Savory Lentil and Mushroom Pot Pie is crafted to be prepared in a large, oven-safe pot or Dutch oven. This cookware provides even heat distribution for sautéing vegetables and mushrooms on the stovetop, while its oven-safe design lets you bake the biscuit topping directly in the same vessel—eliminating messy transfers.

A heavy-bottomed pot prevents sticking and scorching, ensuring the lentils cook tenderly during simmering. This one-pot technique aligns with the recipe’s easy, family-friendly, and meal prep goals, maximizing convenience and minimizing cleanup.

Select a pot large enough to comfortably hold the filling with the biscuit topping layered on top and safe for oven use at 425°F (220°C). Avoid pans without oven-safe certification, as baking at high temperature is essential to achieve the golden, puffed biscuit crust that completes this comforting dish.

Cookware Size Guidance

Choosing the right cookware size is crucial for success with this One-Pot Savory Lentil and Mushroom Pot Pie. We recommend using a 5 to 6-quart oven-safe Dutch oven or large heavy-bottomed pot to accommodate sautéing the vegetables, simmering the lentil filling without crowding, and spreading the biscuit topping evenly.

Using the correct size prevents overflow during simmering and ensures even biscuit baking. A pot too small will cause spills and uneven cooking, while an overly large pot may yield a thinner filling layer, affecting the hearty texture and flavor.

If a Dutch oven is not available, a large, deep oven-safe skillet with a lid can work as long as it fits all ingredients and withstands baking temperatures of 425°F (220°C).

Selecting the ideal pot supports the recipe’s easy, family-friendly, and comforting one-pot meal appeal.

Cookware Swap Guidance

This recipe thrives when made in a large, oven-safe pot such as a Dutch oven, allowing seamless stovetop cooking and oven baking. However, if unavailable, here are practical cookware alternatives:

  • Heavy-bottomed, oven-safe casserole dish plus deep skillet: Sauté the filling in a skillet, then transfer to a casserole dish to bake the biscuit topping. Though two pans are used, cleanup remains manageable.
  • Oven-safe deep skillet with lid: Cast iron or stainless steel skillets that can go from stovetop to oven allow for similar one-pot convenience.
  • Slow Cooker insert: Prepare filling in the slow cooker, then bake biscuits separately in the oven. This loses the direct stovetop-to-oven flow but offers an easy slow cooker option.
  • Instant Pot with baking accessory: Use the Instant Pot sauté function for cooking filling, then bake biscuits in an oven-safe insert with the baking lid. This method requires additional cookware and alters the one-pot benefit.

When swapping cookware, prioritize vessels that retain and distribute heat evenly to preserve the rich flavors and textures of the lentil filling and biscuit crust. Ensure handles and lids are oven-safe to maintain simplicity and yield perfect results.

Leftovers Quality

This hearty, savory pot pie stores exceptionally well, making it ideal for meal prep and family-friendly lunches or dinners. After cooking and cooling, store leftovers in an airtight container in the refrigerator for up to 4 days. For extended preservation, freeze tightly wrapped portions or in freezer-safe containers for up to 3 months without sacrificing flavor or texture.

To reheat refrigerated servings, cover loosely with foil and warm in a preheated oven at 350°F (175°C) for 20-25 minutes until biscuits are heated through and crispy on top, restoring that fresh-baked delight. Microwaving for 2-3 minutes on medium power works for single servings but may soften the biscuit crust.

For frozen portions, thaw overnight in the fridge, then reheat similarly in the oven. Slow reheating keeps the filling moist and preserves the golden, flaky biscuit topping, delivering a comforting, easy meal experience every time.

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