2) Mix the lemon juice in with the apples and add to the huckleberries. Stir to combine, and then add the remaining filling ingredients and combine.
4) Place the berry/apple mixture in a 1/2 sheet pan with a border or a dish and spread evenly. Put the topping on top of the filling and spread evenly over the berries. Press the topping down well on the berries.
5) Bake for 1 hour or until brown; check during baking for doneness. Remove from the oven, leave to cool for 20 minutes and serve with vanilla ice cream