How to Make Banana Walnut Baked Oats: The Best BreakfastEver!

Ingredients:

30 g rolled oats (1/4 cup)
1/2 banana(70 g)
50 ml milk/ plant milk (1/5 cup)
1 egg
1 tbsp carob powder/cocoa
3g baking powder ( 3/4 tsp)
pinch of salt
walnuts