A hearty vegetarian twist on classic shepherd’s pie. Savory lentils and vegetables are simmered in a rich herb gravy, then topped with creamy sweet potato mash and Parmesan before being baked until golden and bubbling.
Ingredients
For the Lentil Filling
1½ cups cooked green or brown lentils, drained
1 tablespoon olive oil
1 medium yellow onion, finely diced
2 medium carrots, diced
2 celery stalks, diced
8 oz (225 g) mushrooms, finely chopped
3 cloves garlic, minced
2 tablespoons tomato paste
1 cup vegetable broth
½ cup dry red wine, optional
1 tablespoon Worcestershire sauce or vegetarian Worcestershire sauce
1 teaspoon dried thyme
1 teaspoon dried rosemary
½ teaspoon smoked paprika
½ teaspoon salt
½ teaspoon black pepper
1 cup frozen peas
1 tablespoon chopped fresh parsley
For the Sweet Potato-Parmesan Crust
2½ lb (1.1 kg) sweet potatoes, peeled and cubed
2 tablespoons butter
¼ cup milk
½ cup freshly grated Parmesan cheese
1 egg yolk
½ teaspoon salt
¼ teaspoon black pepper
½ teaspoon garlic powder
¼ teaspoon dried thyme
For the Topping
¼ cup additional Parmesan cheese
1 tablespoon olive oil or melted butter
Fresh parsley, optional
Freshly cracked black pepper
Instructions
1. Prepare the Sweet Potatoes
Place the peeled and cubed sweet potatoes in a large pot.
Cover with cold water and add a pinch of salt.
Bring to a boil.
Reduce the heat and simmer for 15–20 minutes, or until completely fork-tender.
Drain thoroughly.
Return the sweet potatoes to the warm pot and let them sit for 1–2 minutes to release excess moisture.
2. Make the Sweet Potato-Parmesan Mash
Mash the warm sweet potatoes until mostly smooth.
Add butter and milk.
Stir in Parmesan cheese.
Add egg yolk, salt, black pepper, garlic powder, and thyme.
Mix until creamy and well combined.
Set aside.
3. Prepare the Lentil Filling
Preheat the oven to 400°F (200°C).
Heat olive oil in a large oven-safe skillet over medium heat.
Add the onion, carrots, celery, and mushrooms.
Cook for 7–9 minutes, stirring occasionally, until the vegetables soften.
Add minced garlic and cook for another 30–60 seconds.
Stir in tomato paste and cook for 1–2 minutes.
4. Build the Savory Gravy
Add:
Vegetable broth
Red wine, if using
Worcestershire sauce
Thyme
Rosemary
Smoked paprika
Salt
Black pepper
Stir well.
Bring the mixture to a gentle simmer and cook for 5–7 minutes, allowing the liquid to reduce slightly.
5. Add the Lentils & Peas
Stir in the cooked lentils.
Add the frozen peas.
Simmer for another 3–5 minutes.
The filling should be thick and moist rather than watery.
Stir in fresh parsley.
Taste and adjust the seasoning.
6. Assemble the Pie
If using an oven-safe skillet, spread the filling evenly in the bottom.
Otherwise, transfer the filling to a 9 × 13-inch baking dish.
Spoon the sweet potato mash over the lentil mixture.
Spread it gently into an even layer.
Use a fork to create ridges across the top. These ridges become beautifully golden and crispy during baking.
7. Add the Parmesan Crust
Sprinkle the remaining Parmesan evenly over the sweet potato layer.
Drizzle lightly with olive oil or melted butter.
8. Bake
Bake uncovered for 20–25 minutes, until the filling is bubbling and the top is golden.
For a deeper golden crust, broil for 1–3 minutes, watching carefully.
9. Rest & Serve
Remove from the oven and allow the shepherd’s pie to rest for 10 minutes before serving.
Garnish with fresh parsley and freshly cracked black pepper.
Preparation & Cooking Time
Prep Time: 25 minutes
Cook Time: 45 minutes
Total Time: About 1 hour 10 minutes
Servings: 6
Difficulty: Moderate
Approximate Nutrition Per Serving
Based on 6 servings:
Calories: 430 kcal
Protein: 18 g
Carbohydrates: 58 g
Fiber: 14 g
Net Carbs: 44 g
Fat: 15 g
Saturated Fat: 7 g
Sugar: 12 g
Sodium: 650–750 mg
Nutrition is approximate and will vary depending on the lentils, cheese, broth, and other ingredients used.
Nut & Allergen Information
Nuts: This recipe contains no nuts in its standard form.
Dairy: Contains butter, milk, and Parmesan cheese.
Eggs: Contains egg yolk.
Gluten: The recipe can be gluten-free, but check the Worcestershire sauce and vegetable broth labels carefully. Use certified gluten-free products if needed.
Soy: Usually none, but check Worcestershire sauce and vegetable broth labels.
Nut-Free Note
The recipe is naturally nut-free. If cooking for someone with a severe allergy, check all packaged ingredients and prevent cross-contact.
Variations
Make It Vegan
Replace:
Butter with olive oil or vegan butter
Milk with unsweetened plant milk
Parmesan with vegan Parmesan
Egg yolk with 1 tablespoon nutritional yeast plus 1 teaspoon cornstarch
Use vegetarian/vegan Worcestershire sauce.
Add More Vegetables
You can add:
Corn
Zucchini
Spinach
Green beans
Bell peppers
Add More Protein
Mix in:
White beans
Chickpeas
Extra lentils
Crumbled tofu
Make It Spicy
Add:
¼ teaspoon cayenne
Red pepper flakes
½ teaspoon chili powder
Recipe Q&A
Q: Can I use canned lentils?
Yes. Drain and rinse them thoroughly before using. You need approximately 2 cans (15 oz each) to provide enough cooked lentils.
Q: Can I use red lentils?
Yes, but red lentils become much softer and create a less chunky filling. Green or brown lentils provide a more traditional texture.
Q: Can I make this ahead of time?
Yes. Assemble the entire pie, cover it, and refrigerate for up to 24 hours. Bake when ready, adding approximately 10 minutes to the baking time.
Q: Can I freeze it?
Yes. Allow it to cool completely, cover tightly, and freeze for up to 2–3 months.
Q: Why is my filling watery?
The filling needs to be fairly thick before adding the sweet potato topping. Simmer it longer to reduce excess liquid.
Q: Can I use regular potatoes instead of sweet potatoes?
Absolutely. Russet or Yukon Gold potatoes can be substituted, although the flavor will be less sweet.
Q: Can I prepare the sweet potato topping ahead of time?
Yes. Refrigerate the prepared mash in an airtight container for up to 2 days.
Q: Can I use frozen vegetables?
Yes. Frozen peas work especially well. You can also use a frozen mixed vegetable blend.
Q: What makes this a shepherd’s pie?
Traditional shepherd’s pie uses a savory filling topped with mashed potatoes. This vegetarian version uses lentils instead of meat and sweet potatoes instead of regular potatoes.
Q: How do I get a crispy Parmesan crust?
Make ridges in the sweet potato topping with a fork, sprinkle generously with Parmesan, and broil briefly at the end.
Q: How should leftovers be stored?
Refrigerate leftovers in an airtight container for up to 4 days. Reheat individual portions in the microwave or larger portions in a 350°F (175°C) oven until hot.
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