Method:

1. Heat the oven to 190C/170C fan/ gas 5.
    
2. Tip the oats into a heatproof bowl.
    
3. Pour over 450ml boiling water from the kettle.
    
4. Stir well, then stir in the vanilla and almond milk.
    
5. Mash the banana.
    
6. Spread over the base of a medium baking dish (ours was a 20 x 28cm oval) and stir in the frozen fruit to fully combine. You want the banana to sweeten the berries, but you can add 1 tsp maple syrup, if you like.
    
7. Pour over the oat mixture and scatter with the almonds.
    
8. Bake for 30-40 mins until set and the fruit juices are bubbling at the edges of the dish.
    
9. Scoop into bowls and serve with a little extra milk, if you like.