Cherry Rhubarb Cobbler
["1 can (21 oz.) cherry pie filling", "3 c. chopped rhubarb", "1 c. sugar", "4 Tbsp. butter or margarine"]
["Spread fruit in a 13 x 9 x 2-inch baking pan.", "Sprinkle with sugar and dot with butter."]
["cherry pie filling", "rhubarb", "sugar", "butter"]