Jersey Apple and Blackberry Crumble with Crème Fraîche

Preheat oven to 180°C (350°F).

In a large bowl, combine the sliced apples, blackberries, granulated sugar, and lemon juice. Toss gently to coat.

Pour the fruit mixture into the baking dish.

To make the crumble topping, in a separate bowl, combine the flour, cold butter, brown sugar, and oats (if using).

Rub the butter into the flour and sugar mixture using your fingertips until it resembles breadcrumbs. Avoid overworking the mixture.

Sprinkle the crumble topping evenly over the fruit mixture.

Bake in the preheated oven for 30 minutes, or until the crumble is golden brown and the fruit is bubbling.

Let cool slightly before serving.

Serve warm with a dollop of crème fraîche.