1 tablespoon olive oil
1 cup chopped onion
3/4 cup finely chopped peeled carrots
2 tablespoons minced garlic
8 ounces lean ground beef
6 ounces spicy Italian sausages, casings removed
1 28-ounce can crushed tomatoes with added puree
1/4 cup tomato paste
1/4 cup chopped fresh basil
1 tablespoon golden brown sugar
1 tablespoon dried oregano
1 bay leaf
1/2 teaspoon dried crushed red pepper
15 lasagna noodles (about 12 ounces)
2 15-ounce containers part-skim ricotta cheese
1 cup grated Parmesan cheese (about 3 ounces)
1 10-ounce package frozen chopped spinach, thawed, drained, squeezed dry
2 large eggs
4 3/4 cups grated mozzarella cheese (about 1 1/4 pounds)