Apple Crumble

It is still time to bake it for 5 o´clock tea.
I take for one serving: 1 apple, lemon juice, 25g butter 25g sugar 40g flour, some chopped walnuts. Peel the apple, cut into slices, drizzle with lemon juice, put the flour, butter and sugar and chopped walnuts into a bowl and mix with hands to crumble. Place the apple in an ovenproof dish, put the crumbs on top and bake at 170 degrees until the crumbs are light brown. Add a little ball of vanilla ice cream and a tablespoon of cream. Tasty tasty! In the spring I also make crumble with rhubarb or gooseberries, later cherries and apples or plums in autumn.