Spoon 400 grams ( 2 cups) of plum and orange compote into an oven proof dish.
Put 50 grams (⅓ cup) plain (all-purpose) flour and 50 grams (3½ tbsp) butter, cut into cubes, into a bowl. Rub the butter into the flour to make a rough crumb.
Add 50 grams (⅓ cup) rolled oats and stir to mix.
Add 3 tablespoons soft brown sugar to the crumble mix and stir through.
Spoon the crumble mix on top of the plum and orange compote and bake in a preheated oven for 20 minutes until golden brown on top.
Serve the baked Plum and Orange Oat Crumble warm with custard, cream, ice cream or Greek yogurt.