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Casserole Layered Sweet Potato, Lentil, and Spinach Pie

By PanPotPlates Test KitchenReviewed by PanPotPlates Editorial TeamPublished May 10, 2026
Vegetarian Comfort 60 mins casserolesvegetarianfamily-friendlyhealthyglutenfreedairyfreebudget-friendlymealprepcomfortfoodfreezablekid-friendly

A nourishing, family-friendly vegetarian casserole featuring layers of creamy mashed sweet potatoes, hearty lentils, and vibrant spinach. This gluten- and dairy-free dish is perfect for an easy comfort meal that’s kid-friendly and ideal for meal prep.

Casserole Layered Sweet Potato, Lentil, and Spinach Pie
Prep 15 min
Cook 45 min
Total 60 min
Servings 6
Difficulty easy
Cuisine Vegetarian Comfort

Recipe Details

Prep15 min
Cook45 min
Total60 min
Servings6
Difficultyeasy
CuisineVegetarian Comfort
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Ingredients

Servings 6
  • 2 large sweet potatoes (about 2 pounds), peeled and chopped
  • 1 cup dried brown or green lentils, rinsed
  • 3 cups fresh spinach, washed and chopped
  • 1 medium onion, diced
  • 2 cloves garlic, minced
  • 1 tablespoon olive oil
  • 1 teaspoon smoked paprika
  • 1/2 teaspoon ground cumin
  • 1/4 teaspoon ground black pepper
  • 1 teaspoon dried thyme
  • 1/2 teaspoon salt, adjust to taste
  • 2 cups vegetable broth
  • 2 tablespoons nutritional yeast (optional, for a cheesy flavor)
  • 1 tablespoon lemon juice
  • Fresh parsley or chives for garnish (optional)

Instructions

  1. Preheat oven to 375°F (190°C).
  2. Place the chopped sweet potatoes in a large pot and cover with water. Bring to a boil and cook until tender, about 15 minutes. Drain and mash with lemon juice and nutritional yeast if using. Set aside.
  3. While sweet potatoes cook, heat olive oil in a medium skillet over medium heat. Add diced onion and sauté until softened, about 5 minutes.
  4. Add minced garlic, smoked paprika, cumin, thyme, salt, and pepper. Cook for 1 more minute until fragrant.
  5. Add rinsed lentils and vegetable broth to the skillet. Bring to a boil, then reduce heat and simmer, covered, for 20-25 minutes or until lentils are tender and liquid is mostly absorbed.
  6. Stir chopped spinach into the cooked lentils and cook just until wilted, about 2 minutes. Adjust seasoning as needed.
  7. In a 9x9-inch casserole dish, spread the lentil-spinach mixture evenly on the bottom.
  8. Layer the mashed sweet potatoes evenly over the lentils.
  9. Bake uncovered for 20-25 minutes until the top is lightly golden and heated through.
  10. Remove from oven and let rest for 5 minutes before serving.
  11. Garnish with fresh parsley or chives if desired. Serve warm.

Frequently Asked Questions

Reader questions and answers for this recipe will appear here.

Customize this comforting casserole layered sweet potato, lentil, and spinach pie with these ingredient swaps to suit dietary preferences or pantry availability:

  • Sweet Potatoes: Substitute with butternut squash or pumpkin for a similarly creamy, naturally sweet element.
  • Lentils: Use red lentils for a softer texture or canned lentils to reduce cook time—adjust liquid accordingly.
  • Spinach: Replace fresh spinach with kale or Swiss chard; pre-wilt kale to soften before adding.
  • Vegetable Broth: Swap with mushroom broth or homemade vegetable stock for deeper flavor complexity.
  • Olive Oil: Substitute avocado oil or a mild neutral oil if preferred.
  • Nutritional Yeast: Omit or replace with vegan cheese for cheesy flavor. For non-vegan variations, grated Parmesan cheese works well.
  • Onion and Garlic: Use shallots or garlic powder as convenient alternatives.
  • Spices: Swap smoked paprika with regular paprika or chipotle powder; cumin can be replaced by ground coriander or mild curry powder.

These substitutions keep your meal easy, healthy, vegetarian, glutenfree, dairyfree, budget-friendly, and family-friendly, maintaining the recipe’s comforting charm and versatility.

Pan Or Pot Required

For this hearty and family-friendly casserole, essential cookware includes:

  • Large Pot: For boiling and mashing sweet potatoes, providing enough space for even cooking and smooth mashing with lemon juice and nutritional yeast.
  • Medium Skillet: Perfect for sautéing diced onion and spices, then simmering lentils with vegetable broth until tender. A skillet with a lid helps retain moisture and develop flavor.
  • 9x9-inch Casserole Dish: Ideal for layering the lentil-spinach base and mashed sweet potatoes, this dish ensures even baking for a golden, comforting top layer.

This minimal cookware setup simplifies preparation and cleanup, aligning perfectly with this recipe’s budget-friendly, mealprep, and kid-friendly attributes.

Cookware Size Guidance

Use a 9x9-inch casserole dish (about 2 quarts) for the best results when making this Layered Sweet Potato, Lentil, and Spinach Pie. The size allows proper layering without overflow or overly thin layers, which could dry out during baking.

If unavailable, a baking dish between 2 to 2.5 quarts or of similar dimensions works well. Confirm the dish is oven-safe to 375°F (190°C), preferably glass or ceramic for even heat and easy cleanup.

Selecting the correct cookware supports the recipe’s goal of delivering a satisfying, easy-to-prepare, family-friendly casserole that’s perfect for meal prep and leftovers.

Cookware Swap Guidance

This comforting casserole works best baked in a 9x9-inch casserole dish, ensuring even layering and heat distribution essential to the dish’s texture and flavor. However, if you lack this exact cookware, consider these alternatives tailored to maintain ease and flavor:

  • Oven-Safe Skillet or Dutch Oven: A heavy cast iron skillet or Dutch oven oven-safe to 375°F can substitute for the casserole dish, allowing you to bake and serve in the same pan for rustic appeal and easy cleanup.
  • Glass or Ceramic Baking Dish (Alternate Size): Slightly larger or oval dishes work if you adjust the layer thickness and baking time accordingly, ensuring your casserole cooks evenly without drying.
  • Sheet Pan with Edges: A deep, half-sheet pan with raised edges can be used, yielding a thinner, crispier layered bake and faster cooking time, offering a unique twist on the classic casserole.
  • Slow Cooker (Adapted Method): Cook lentils and spinach in the slow cooker to meld flavors, then layer mashed sweet potatoes on top near the end with the lid off to allow slight browning, adapting this to a slow cooker meal style with adjusted timing and texture.

Important: Avoid non-oven-safe pans such as regular non-stick frying pans or plastic containers for safe and delicious results.

Choosing cookware aligned with these guidelines ensures your meal remains quick, easy, healthy, vegetarian, and glutenfree, perfect for busy families.

Leftovers Quality

This layered sweet potato, lentil, and spinach casserole is ideal for meal prep and makes excellent leftovers. Store in an airtight container in the refrigerator for up to 4 days. For longer preservation, freeze tightly wrapped in foil or plastic and store in a freezer-safe container for up to 3 months.

For best reheating results, thaw frozen portions overnight in the fridge. Reheat in a microwave or in a covered oven-safe dish at 350°F (175°C) for 15-20 minutes until warmed through. Alternatively, gently warm on the stovetop over medium-low heat to maintain moist lentils and creamy sweet potatoes. Avoid overheating to prevent drying.

Enjoy this healthy, comforting casserole any night of the week with minimal effort and maximum nutrition.

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