Mashed Potato Lasagna with Vegetable Sauce

The aroma of lasagna always takes me back to Sunday dinners at my grandmother’s house. But this isn’t your typical meat-heavy lasagna; this is a celebration of vegetables embraced by creamy mashed potatoes and layers of cheesy goodness. I remember the first time I made this using leftover roasted garlic mashed potatoes – the subtle sweetness of the garlic permeated every layer, creating something truly special. The soft potato mixed with the hearty vegetables was an absolute delight.

Recipe Overview

• Prep Time: 45 minutes
• Cook Time: 45-50 minutes
• Total Time: 1 hour 30 minutes
• Servings: 12
• Yield: One 9×13 inch lasagna
• Dietary Type: Vegetarian

Ingredients

• 12 1/2 ounces fresh lasagna noodles (cook according to directed on package if not using fresh)

For the Sauce:

• 2 tablespoons olive oil
• 1 medium onion, diced
• 4 large garlic cloves, minced
• 2 large carrots, fine dice
• 2 large celery ribs, thinly sliced
• 1 bell pepper, diced (any color)
• 2 tablespoons fresh basil, chopped
• 2 tablespoons dried oregano
• 1 tablespoon fresh parsley, chopped
• 1 teaspoon salt
• 1 teaspoon pepper
• 1 bay leaf
• 2 (28 ounce) cans crushed tomatoes

For the Cheese Mixture:

• 2 eggs
• 4 ounces mozzarella cheese, cubed
• 12 ounces mozzarella cheese, shredded
• 1 1/2 lbs ricotta cheese
• 1/4 cup Romano cheese, grated
• Fresh grated nutmeg, to taste

For the Filling:

• 1 1/2 cups leftover mashed potatoes (roasted garlic is recommended)

For the Topping:

• 4 ounces mozzarella cheese, sliced
• 1/8 cup Romano cheese, grated

Equipment Needed

• Large pot for boiling water
• Large heavy pot or Dutch oven
• 9×13 inch casserole dish
• Mixing bowl
• Aluminum foil

Instructions

1. Preheat your oven to 350°F (175°C).
2. Bring a large pot of salted water to a boil. Have this ready for briefly dipping the fresh lasagna noodles.
3. In a large, heavy pot or Dutch oven, heat the olive oil over medium heat.
4. Add the diced onion, minced garlic, fine diced carrots, and thinly sliced celery ribs to the pot. Sauté the vegetables for about 10 minutes, stirring occasionally, until they soften and become slightly translucent.
5. Add the diced bell pepper, chopped fresh basil, dried oregano, chopped fresh parsley, salt, pepper, and bay leaf to the pot. Stir well to combine.
6. Pour in the two cans of crushed tomatoes. Bring the sauce to a boil, then reduce the heat to low and simmer for 30 minutes, stirring often to prevent sticking. This allows the flavors to meld together beautifully.
7. While the sauce is simmering, prepare the cheese mixture. In a mixing bowl, combine the eggs, cubed mozzarella cheese, shredded mozzarella cheese, ricotta cheese, and grated Romano cheese. Grate some fresh nutmeg into the mixture to taste. Mix all ingredients until well combined, then set aside.
8. Prepare your lasagna noodles. If you are using fresh lasagna noodles, briefly dip two noodles at a time into the boiling water for just a few seconds to soften them slightly and remove excess starch. Shake off any excess water before placing them in the casserole dish. If using dried noodles, cook them according to the package directions until al dente, making sure not to overcook them.
9. In a 9×13 inch casserole dish, spread 1 cup of the prepared vegetable sauce evenly across the bottom.
10. Take two of the prepared lasagna noodles and place them over the sauce on the bottom of the dish, overlapping slightly if needed. Spread 1 cup of the cheese mixture evenly over the noodles. Follow with 1/2 cup of the leftover mashed potatoes, distributing them in small dollops. Finally, spread 1 cup of the vegetable sauce over the mashed potatoes.
11. Repeat step #10 for two more layers, each time starting with the noodles, then cheese mixture, then mashed potatoes, and then the sauce.
12. Place the last two lasagna noodles on top of the final layer of sauce. Spread the remaining cheese mixture evenly over the noodles.
13. Arrange the sliced mozzarella cheese on top of the cheese mixture, overlapping the slices to cover the entire surface. Top with the remaining vegetable sauce and sprinkle with the grated Romano cheese.
14. Cover the casserole dish lightly with aluminum foil and bake in the preheated oven for 30 minutes.
15. Remove the foil and continue to bake for another 15-20 minutes, or until the cheese is melted, bubbly, and lightly golden brown.
16. Once the lasagna is done baking, remove it from the oven and let it rest for at least 15 minutes before slicing and serving. This allows the lasagna to set and prevents it from being too runny.

Expert Tips & Tricks

• For an even richer flavor, consider adding a splash of heavy cream to the cheese mixture.
• If your mashed potatoes are a bit dry, add a tablespoon or two of milk or cream to loosen them up before adding them to the lasagna.
• Don’t overcook the lasagna noodles when pre-cooking them, as they will continue to cook in the oven.
• To prevent the top of the lasagna from browning too quickly, you can tent it with aluminum foil during the last 10 minutes of baking.
• If you want to add a touch of spice, consider adding a pinch of red pepper flakes to the vegetable sauce.
• For a smoky flavor, use smoked mozzarella cheese for the topping.

Serving & Storage Suggestions

Serve the Mashed Potato Lasagna warm, garnished with a sprinkle of fresh parsley or basil. This lasagna is delicious on its own, or you can serve it with a simple side salad or some crusty bread for dipping into the sauce.

To store leftovers, let the lasagna cool completely before covering it tightly with plastic wrap or transferring it to an airtight container. It can be stored in the refrigerator for up to 3-4 days. To freeze, cut the lasagna into individual portions and wrap each portion tightly in plastic wrap and then foil. Frozen lasagna can be stored for up to 2-3 months.

To reheat, thaw the lasagna in the refrigerator overnight. Reheat in the oven at 350°F (175°C) until heated through, or microwave individual portions for a quicker option.

Nutritional Information

Nutrient	Amount per Serving	% Daily Value
Calories	363 kcal	N/A
Calories from Fat	201g	55%
Total Fat	22.4 g	34%
Saturated Fat	12.1 g	60%
Cholesterol	100.7 mg	33%
Sodium	854.1 mg	35%
Total Carbohydrate	20.9 g	6%
Dietary Fiber	4 g	16%
Sugars	2.5 g	N/A
Protein	22 g	44%

Variations & Substitutions

• Gluten-Free: Use gluten-free lasagna noodles.
• Dairy-Free: Substitute the mozzarella and ricotta cheese with plant-based alternatives. Use a cashew-based ricotta and a dairy-free mozzarella shred.
• Spicy Version: Add a pinch of red pepper flakes or a dash of hot sauce to the vegetable sauce.
• Seasonal Vegetables: Feel free to substitute the vegetables in the sauce based on what’s in season. Zucchini, squash, or eggplant would all be delicious additions.
• Herb Variations: Experiment with different herbs in the sauce, such as thyme, rosemary, or sage.
• Vegan: Use vegan lasagna noodles, plant-based cheese alternatives and omit the eggs.

FAQs (Frequently Asked Questions)

Q: Can I use store-bought mashed potatoes?

A: While homemade mashed potatoes are recommended for the best flavor and texture, store-bought mashed potatoes can be used in a pinch. Just be sure to choose a brand that you enjoy and that has a creamy consistency.

Q: How can I prevent the lasagna from becoming too watery?

A: Make sure to drain any excess water from the cooked lasagna noodles before assembling the lasagna. Also, be sure to simmer the vegetable sauce for a sufficient amount of time to allow it to thicken.

Q: Can I make this lasagna ahead of time?

A: Yes, this lasagna can be assembled ahead of time and stored in the refrigerator for up to 24 hours before baking. Just be sure to cover it tightly to prevent it from drying out. You may need to add a few minutes to the baking time if baking from cold.

Q: What kind of mashed potatoes work best?

A: Roasted garlic mashed potatoes add a subtle sweetness. Using Yukon Gold potatoes creates a richer, creamier texture than Russets.

Q: Can I add meat to this lasagna?

A: Absolutely! While this recipe is vegetarian, you can easily add cooked ground beef, sausage, or turkey to the vegetable sauce for a heartier meal.

Final Thoughts

This Mashed Potato Lasagna with Vegetable Sauce is a truly comforting and satisfying dish that’s perfect for any occasion. Whether you’re looking for a vegetarian alternative to traditional lasagna or simply want to use up leftover mashed potatoes, this recipe is sure to please. Don’t be afraid to experiment with different vegetables, cheeses, and herbs to create your own unique version. I hope you enjoy making and sharing this lasagna with your loved ones as much as I do! Please let me know how it turns out and what variations you tried – I’m always eager to hear your feedback. Consider serving this lasagna with a light and crisp white wine, such as Pinot Grigio, or a refreshing Italian soda. Buon appetito!