Preheat oven to 375°F. Oil or spray a 13 x 9 x 3 inch pan. If your pan is only 2 inches high it may boil over, either make one less layer or place the pan on a baking sheet.
Brown meat, drain and crumble into small bits. In a small bowl beat eggs briefly then combine with ricotta, Parmesan and 2 cups mozzarella cheese.
Layer as follows:◾1 cup pasta sauce◾4 sheets of pasta, ⅓ of ricotta mixture, half of meat, 1 cup of mozzarella, 1 cup pasta sauce◾4 sheets of pasta, ⅓ of ricotta mixture, 1 ½ cups of pasta sauce◾4 sheets of pasta, remaining ricotta mixture and meat, 1 cup sauce◾4 sheets of pasta, remaining sauce and mozzarella
Bake covered with foil until bubbly, about 50-60 minutes.
Uncover and cook until cheese is melted, about 5 minutes. Let stand 15 minutes before serving.