Step 1

Preheat oven to 350°. Cook noodles according to package directions. Meanwhile, in a large skillet, cook beef over medium heat until no longer pink; drain. Stir in taco seasoning. In a small bowl, combine egg whites and ricotta cheese. Drain noodles.

Step 2

In each of two 13x9-in. baking dishes, layer 4 noodles, 2/3 cup ricotta mixture, half the beef mixture and 1-1/3 cups cheddar cheese. Top each with 4 noodles, 2/3 cup ricotta mixture, 1-1/3 cups salsa and 1-1/3 cups cheese. For final layer, top each with 4 noodles, 2/3 cup ricotta mixture, 1-1/3 cups salsa and 1-1/3 cups cheese.

Step 3

Bake, uncovered, 35-40 minutes or until heated through. Let stand for 10 minutes before cutting.