Spinach Lasagna
["1 (15 oz.) pkg. Ricotta cheese", "1 (10 oz.) pkg. chopped spinach, thawed and well drained", "1/2 c. grated Parmesan cheese", "1 egg", "3 c. spaghetti sauce", "8 oz. lasagna noodles, cooked and drained", "1 (16 oz.) pkg. Mozzarella cheese"]
["Preheat oven to 375\u00b0.", "Mix together Ricotta cheese, spinach, Parmesan cheese and egg until well blended.", "Layer 1 cup sauce, 3 noodles, 1 cup Ricotta cheese mixture and part of Mozzarella cheese in 12 x 8-inch baking dish.", "Repeat layers twice.", "Cover with foil.", "Bake 20 minutes; remove foil and bake 15 minutes longer.", "Let stand 10 minutes.", "Serves 6 to 8."]
["Ricotta cheese", "chopped spinach", "Parmesan cheese", "egg", "spaghetti sauce", "lasagna noodles", "Mozzarella cheese"]