Rhubarb Butter Crunch
["3 c. rhubarb, chopped", "1 c. sugar", "3 Tbsp. flour", "1 c. oats", "1 c. brown sugar, packed", "1 1/2 c. flour", "1/2 c. butter", "1/2 c. margarine"]
["Preheat", "oven", "to", "350\u00b0.", "Mix", "rhubarb with sugar and 3 tablespoons flour in a 9 x 9-inch baking pan.", "Mix oats, brown sugar", "and 1 1/2 cups flour in bowl.", "Cut in butter and margarine until crumbly.", "Sprinkle over rhubarb.", "Bake 40 minutes. May double", "rhubarb", "for", "a", "9 x 13-inch pan, leaving topping ingredients the same."]
["rhubarb", "sugar", "flour", "oats", "brown sugar", "flour", "butter", "margarine"]