1 1/2 c. Post Fruit & Fibre cereal (any variety)
1 3/4 c. unsifted all-purpose flour
3/4 c. firmly packed light brown sugar
1 tsp. baking soda
1/2 tsp. baking powder
1 (8 oz.) container plain non-fat yogurt
4 egg whites
4 1/2 tbsp. unsalted butter, softened and divided
1/4 c. skim milk
1 1/3 c. sliced fresh peaches (about 3/4 lb.) or 1 (16 oz.) sliced peaches in extra light syrup, well drained
1 tbsp. lemon juice
1 tsp. vanilla

Preheat oven to 350 degrees. Spray a 9 inch square baking pan with non-stick cooking spray; set aside. In a large bowl of an electric mixer, place 1 cup cereal; crush lightly. Add flour, brown sugar, baking soda, baking powder, yogurt, egg whites, 4 tablespoons butter, milk, and vanilla. Blend on low speed until combined, then beat at medium speed for 30 seconds; pour batter into prepared pan. If using fresh peaches, toss with lemon juice. Arrange peaches on top of batter. Melt remaining 1/2 tablespoon butter; mix with remaining 1/2 cup cereal; sprinkle over peaches. Bake until a wooden pick inserted in the center comes out clean, about 45 minutes. Cool in pan on wire rack. Sprinkle with confectioners' sugar just before serving, if desired.