1 (29 oz.) jar marinara sauce
1 (10 oz.) pkg. spinach, chopped
2 lbs. Ricotta cheese
1 (12 oz.) pkg. Mozzarella cheese
2 eggs
2 tbsp. grated Parmesan cheese
1 (12 oz.) pkg. jumbo shells
Or use 1 lb. bulk hot or sweet Italian sausage, cooked

Cook shells according to package directions. Pour marinara sauce into saucepan; heat. Spoon 1 cup of sauce into the bottom of a large roasting pan or 1/2 cup into each of two (2 quart) baking dishes. Reserve remaining sauce; keep warm. Cook spinach as directed on package; drain and mix with ricotta cheese, shredded mozzarella cheese, eggs and parmesan cheese in large bowl. Using a teaspoon, fill each shell with cheese mixture. Arrange shells in single layer on sauce in roasting pan. Bake at 350 degrees for 15 to 20 minutes. Serve with reserved hot sauce.