Preheat the oven to 180°C
Peel and dice the apples.
In a saucepan, put the apples with the sugar and 1 tablespoon of water, cook on low heat to soften slightly.
Put the cooked apples into a small ovenproof baking dish.
In a bowl, put the flour and the rolled oats and mix. Add soft pieces of butter, sugar and rub with your fingertips until you get a crumble texture.
Cover the apples with your crumble mixture.
Bake for 20 minutes until golden.
Serve with our creamy vanilla bean custard for an extra sweet touch!