Stuffed Shells Florentine
["1 (29 oz.) jar marinara sauce", "1 (10 oz.) pkg. chopped spinach", "2 lb. Ricotta cheese", "1 pkg. Mozzarella cheese", "2 eggs", "2 Tbsp. grated Parmesan cheese", "1 (12 oz.) pkg. jumbo shells (1 c., Ronzini)"]
["Cook shells according to package directions.", "Pour marinara sauce into saucepan and heat.", "Spoon 1 cup of sauce into bottom of a large roasting pan or 1/2 cup sauce into each of two 2-quart baking pans.", "Reserve remaining sauce; keep warm."]
["marinara sauce", "chopped spinach", "Ricotta cheese", "Mozzarella cheese", "eggs", "Parmesan cheese", "jumbo shells"]