Meat and Eggplant Sauce Lasagna Recipe

Ingredients

• 1 tablespoon olive oil, or more as needed
• 1/2 large white onion, diced
• 5 cloves garlic, finely chopped
• 1 pound lean ground beef
• salt and ground black pepper to taste
• 2 (28 ounce) cans crushed tomatoes
• 1 eggplant, peeled and diced
• 2 zucchini, peeled and diced
• 2 cups sliced fresh mushrooms
• 1 cup diced carrots
• 3/4 cup tomato puree
• 2 tablespoons salt
• 2 tablespoons dried basil
• 1 tablespoon ground black pepper
• 1 tablespoon dried oregano
• 1 bay leaf
• 1 (16 ounce) package lasagna noodles
• 4 cups ricotta cheese
• 1 egg
• 4 cups shredded mozzarella cheese, or more to taste
• 1/2 cup grated Parmesan cheese