1 cup flour
1/3 cup butter, room temp
1/2 cup rolled oats 
1/2 cup sugar (better brown)

4 apples
3/4 tsp cinnamon
3/4 tsp nutmeg
lemon juice
3 tbsp sugar
vanilla essence
1 tbsp butter

Step 1 (optional)> Mix filling ingredients. In a saucepan melt butter and add filling mix. Keep steering until apples become mushy. 

Step 2> Preheat oven to 350F. Mix all topping ingredients until it looks like large breadcrumbs. Put apple mix at the bottom of the pan, put the mix on the top and bake for 30-40 min until the top becomes brown. 

Variations: Crumble is very good with rhubarb or mixed berries. Then Step 1 is not needed at all.