I used about 1/2 cup of oats and don't cook them, 100 gram
low-fat greek yogurt and 3 tbsp of milk (to avoid them becoming too thick). You mixed this, let it over night in the
fridge ( at least for six hours), and the next day you can add the rest of the
ingredients. You can use all kind of berries, bananas, chia seeds, so basically
everything you like.