1

To make sauce, heat oil in a large, heavy saucepan over medium heat. Add onion, carrot, celery and garlic; cook, stirring frequently until vegetables are tender, about 15 minutes.

2

Increase heat to medium-high and add beef; cook until browned, breaking up clumps of meat with a spoon as it cooks, about 5 minutes.

3

Add wine; cook, stirring once or twice, until most of the liquid has evaporated, about 2 to 3 minutes. Stir in crushed tomatoes, tomato paste, oregano, salt, black pepper and red pepper flakes; increase heat to high and bring to a boil. Reduce heat to low and simmer, uncovered, until sauce thickens, about 20 minutes; stir in basil.

4

Preheat oven to 375°F. To make filling, in a medium bowl, stir together ricotta cheese, egg, Parmesan cheese and parsley.

5

To assemble lasagna, in bottom of a 13- X 9-inch baking dish, spread 2 cups of meat sauce; layer 4 noodles over top, overlapping slightly to fit. Spoon about 2 1/4 cups meat sauce over noodles; top with ½ cup ricotta mixture and 1/2 cup mozzarella. Repeat layering with remaining noodles, meat sauce and ricotta mixture, reserving ½ cup mozzarella cheese.

6

Cover lasagna with foil and bake 45 minutes. Remove foil, sprinkle with remaining ½ cup mozzarella and bake until cheese melts and is lightly browned, about 5 minutes more; remove from oven and let stand 15 minutes before slicing into 12 pieces. Yields 1 piece per serving.