Peel and finely dice the onion and garlic. Mix the low-fat quark with mustard, egg, Emmentaler, onion and garlic cubes, herbs and spices in a bowl. Then knead in the minced turkey and breadcrumbs. If there is not enough binding, use a little more breadcrumbs.
Preheat the oven to 180 ° C top and bottom heat and line a baking sheet with baking foil or baking paper. Shape the mixture into meatballs, place on the prepared tray and bake for about 25 minutes.