2 Cups POST GRAPE-NUTS Brand Flakes 3/4 Cup flour 1/4 Cup firmly packed brown sugar 1/2 Teaspoon ground cinnamon 1/2 Cup -- (1 stick) margarine 1 Container BREYERS Strawberry Lowfat -- Yogurt 1 egg slightly beaten 2 Tablespoons flour|HEAT oven to 350?F. MIX cereal, 3/4 cup flour, sugar and cinnamon in small bowl. Cut in margarine until coarse crumbs form. Press 1/2 the mixture firmly into bottom of greased 8-inch square pan. MIX yogurt, egg and 2 tablespoons flour in another small bowl. Spread over cereal mixture in pan; sprinkle with remaining cereal mixture. BAKE 30 minutes or until golden brown. Cool in pan on wire rack. Cut into bars.