In a medium saucepan cook fruit and sugar over medium heat. Add cornstarch and cook until thick
While the fruit is cooking, in a medium mixing bowl add brown sugar, flour, and oats. Mix.
Add softened butter to oats mixture, and mix with fingers until crumbly
Add fruit mix to lightly greased 8 by 8 baking pan
Top with oats mixture
Bake at 350. For 35 minutes.