4 c. sliced or whole blueberries
1 c. unsifted flour
3/4 c. granulated sugar
1/2 tsp. cinnamon
1/2 c. mayonnaise

Spread berries evenly in an 8 x 8 x 2 inch baking dish. Stir together the flour, sugar and cinnamon. Stir in the mayonnaise until mixture resembles coarse crumbs. Sprinkle over the berries. Bake at 400 degrees for 40 minutes. Serve warm with whipped or ice cream. Serves 6-8.