Preheat oven to 375 °. Cook noodles according to package. Drain noodles and rinse with cold water. Mix ricotta, egg, parsley and 1 cup mozzarella in a bowl.

Cook sausage in a skillet over medium heat until done; drain fat.

Spread 1/2 cup sauce in a 9x13 inch baking dish. Spread 3 tablespoons of ricotta mixture on each noodle; top with some sausage. Roll up each noodles. Arrange seam sides down in baking dish.

Top roll-ups with remaining sauce and mozzarella. Bake, loosely covered, for 15 minutes. Remove cover; bake for 10 minutes longer or until brown and bubbly