Ingredients

1 tsp. lemon juice
4 cups fresh or frozen blueberries, rinsed and drained
1/2 cup sugar
2 Tbsp. all-purpose flour
1-1/4 cups rolled oats
1/2 cup firmly packed brown sugar
1/2 tsp. cinnamon
1/4 cup butter or margarine

Preparation

 Heat oven to moderate (375 F).  Sprinkle lemon juice
over blueberries.  Combine sugar and flour; add to 
blueberries, tossing with a fork to coat blueberries.
Place in 8 inch square baking dish.  For topping, 
combine remaining ingredients, mixing until crumbly.
Sprinkle over blueberries.  Bake in preheated oven
(375 F) for 25-30 minutes.  Serve warm with ice cream.
Yields 6 servings.