PREHEAT oven to 350°F. Mix flour, sugar, baking powder, baking soda and salt in large bowl; set aside. Beat eggs in medium bowl. Add bananas, oil and water; mix well. Add to flour mixture; stir just until moistened. (Batter will be lumpy.) Stir in cereal and walnuts.
POUR evenly into four greased miniature (5-11/16x3-9/32-inch) disposable foil loaf pans.
BAKE 40 min. or until wooden toothpick inserted in centres comes out clean. Cool in pans 10 min.; remove from pans to wire racks. Cool completely.