In large bowl, stir together flour, oats, sugar, baking powder, cinnamon, soda, and raisins. Add bananas, milk, egg whites, and vanilla; beat until lightly mixed. Spread batter in a nonstick (or lightly oiled regular) 9x13 inch pan. Bake in a 350'F. oven until cake is golden brown, just begins to pull from pan sides, and springs back when lightly touched in center, 35-40 minutes. Serve warm or cool, cut into about 5 cm squares. Store as directed. Per piece: 75 calories; 1.8 grams protein; 0.3 grams fat; (0.1 grams saturated fat); 17 grams carbohydrates; 59 milligrams sodium; 0.1 milligrams cholesterol.