Heat oven to 425° F.
Mix 1/2 cup sugar and the cornstarch in 2-quart saucepan. Stir in blueberries, water and lemon juice. Heat to boiling, stirring constantly. Boil and stir 1 minute.
Pour into ungreased 2-quart casserole.
Mix remaining ingredients until soft dough forms. Drop dough by 6 tablespoonfuls onto hot blueberry mixture.
Bake about 15 minutes or until golden brown.
Servings: 6