1/3 c. sour cream
1 (10 oz.) pkg. frozen blueberries, partially thawed
2 tbsp. sugar
Lemon slices for garnish

In covered blender container at low speed, blend sour cream, blueberries, and sugar until smooth (or press blueberries through food mill; mix puree with sour cream and sugar until smooth). Serve soup garnished with lemon slices.