1 (29 oz.) jar marinara sauce or homemade sauce
1 pkg. chopped spinach
2 lbs. Ricotta cheese
1 egg
2 tbsp. grated Parmesan cheese
1 pkg. jumbo shells

Pour marinara sauce into saucepan; heat. Spoon 1 cup sauce into bottom of a large lasagna or roasting pan or 1/2 cup into each of 2 (2-quart) baking dishes. Reserve remaining sauce; keep warm.

Cook spinach as directed on package; drain and mix with Ricotta cheese, egg, and Parmesan cheese in a large bowl. Cook shells according to package directions (12 minutes); drain.

Using a teaspoon, fill each shell in single layer and put on sauce in roasting pan. Bake at 350 degrees for 15-20 minutes. Serve with reserved hot sauce or mix all together before cooking.