Core and puree the apple or grate finely. Mix the porridge with the yogurt and mix with a pinch of cinnamon and about a tablespoon of sugar. If the apple is sweet or if you add a banana to it, you need less or no sugar. Variations: A few oat flakes, a dash of whipped cream, kiwi apples, pears, bananas, raspberries, etc also finely grate or puree and mix in. But the pure apple yogurt also tastes very tasty!