Heat spaghetti sauce and set aside.
Prepare shells as label directs; drain well in colander. Preheat oven to 350 degrees. In a large bowl, combine ricotta and next ten ingredients. Stuff a rounded tablespoonful of cheese mixture into each shell.
Spoon 3/4 cup sauce into each of two 9 X 13" baking dishes.
Place shells, seam side down, over sauce in one layer. Spoon over
remaining sauce; sprinkle with parmesan cheese. Bake for 30 minutes.