For filling, in a medium saucepan combine berries, sugar, water, lemon juice and ½ teaspoon cinnamon. Bring to a boil. Reduce heat. Simmer, uncovered, for about 8 minutes or till slightly thickened, stirring frequently. Remove from heat.

In a mixing bowl stir together flour, oats, brown sugar, ¼ teaspoon cinnamon, and baking soda. Stir in melted margarine or butter till thoroughly combined.

Set aside 1 cup of the oat mixture for topping. Press remaining oat mixture into an ungreased 9x9x2-inch pan. Bake in a 350-degree oven for 20 to 25 minutes.

Carefully spread filling on top of baked crust. Sprinkle with reserved oat mixture. Lightly press oat mixture into filling. Bake in the 350-degree oven for 20 to 25 minutes more or till topping is set. Cool in pan on a wire rack. Cut into bars.