Microwave Blueberry Sauce

2 cups fresh blueberries

¼ cup sugar

1 Tbs. cornstarch

1 Tbs.lemon juice

1/8 tsp. cinnamon

1/8 tsp. allspice

Combine all of the above ingredients in a 1 quart microwave safe casserole. Microwave, uncovered, at full power for 2 minutes. Stir well. Microwave for 2 minutes longer or until mixture is thickened and bubbly. Cool slightly and serve.