Mix everything and keep in the fridge overnight. Consume the next day for breakfast.
You can have it cold or heat it up. If you do heat it up you'll probably need to add more liquid to it.
The oats will last 5-7 days in the fridge.
On the pictures there are two flavours: chocolate with banana and walnuts (add 1/2 tsp unsweetened cocoa powder) and cinnamon apple (1/2 large green apple+ 1/8 tsp ground cinnamon + 1 tbsp sugar or sweetener + 1/2 tbsp water and cook until soft)