Meat and Eggplant Sauce Lasagna

Step 1
Heat oil in a large pot over medium heat. Add onion and garlic; cook and stir until onions start turning clear, 5 to 10 minutes. Add ground beef; season with salt and pepper. Cook and stir until browned and crumbly, 5 to 7 minutes. Add crushed tomatoes. Fill the empty tomato can with water and pour into the sauce.

Step 2
Stir eggplant, zucchini, mushrooms, carrots, tomato puree, 2 tablespoons salt, basil, black pepper, oregano, and bay leaf into the sauce. Bring to a boil; reduce heat to medium-low. Cook, stirring occasionally, until flavors are well blended, about 1 hour. Remove and discard bay leaf.

Step 3
Bring a large pot of lightly salted water to a boil. Cook lasagna noodles in the boiling water, stirring occasionally until tender yet firm to the bite, about 8 minutes. Drain and lay the noodles out on paper towels to dry; remove and discard any broken pieces.

Step 4
Combine ricotta and egg in a bowl; season with salt and pepper and whisk thoroughly.

Step 5
Preheat the oven to 375 degrees F (190 degrees C).

Step 6
Coat the bottom of a large baking pan with the sauce. Layer noodles, ricotta mixture, sauce, mozzarella cheese, and a sprinkle of Parmesan cheese on top. Repeat layering until all used up. Cover the pan with aluminum foil.

Step 7
Bake in the preheated oven until bubbling furiously, 30 to 35 minutes. Uncover pan and increase oven temperature to 400 degrees F (200 degrees C). Continue baking until top is golden brown, 10 to 15 minutes more. Let lasagna sit for 10 to 15 minutes before serving.