3/4 c. sugar
3 tbsp. corn starch
1/4 tsp. salt
1/2 c. water
4 c. fresh or frozen blueberries
1 tbsp. lemon juice
2 tbsp. butter

In saucepan combine sugar, salt and corn starch with water, blueberries and lemon juice. Cook over medium heat until thick. Remove from heat and stir in butter.