Preheat oven to 375.

Combine fruit and sugar and place in a square baking dish or individual serving, oven safe, dishes.

Cut cold butter into small cubes and set aside.

For the topping combine oats, brown sugar, flour, and cinnamon. Add butter cubes and mix ingredients together to form small crumbs. Mix in nuts and sprinkle over fruit.

Bake for 30 minutes or until fruit is tender.