Heat the oven to 350 degrees. In a bowl, mix together the berries, apple, sugar and flour. Pour into two tart dishes, or an 8x8" baking dish. In a large bowl, combine the flour, oats, sugar, salt and mix to combine thoroughly. Add the butter and using a pastry cutter, cut it into the mixture. Then, use your hands to gently squeeze and mix the topping until it all comes together when you squeeze it in the palm of your hand. Bake at 350 for 20-30 minutes or until golden on top. Serve with ice cream.