PREHEAT oven to 350°F. Toss rhubarb with strawberries, 3/4 cup brown sugar and 2 Tbsp. of the flour in large bowl. Place in ungreased 9-inch square baking dish.
MIX 2 Tbsp. brown sugar and the remaining 2 Tbsp. flour in large bowl. Cut in butter with pastry blender or 2 knives until mixture resembles coarse crumbs. Add cereal; stir until well blended. Sprinkle over fruit mixture.
BAKE 30 min. or until topping is lightly browned and rhubarb is tender.
