Heat the oven to 200 degrees.
Mix quark, egg white, baking powder, salt and stevia with a fork.
Grind oat into a flour in the coffee grinder.
Separately mix kefir, yeasts and hot water.
Then mix two mixtures and add oat flour.
Make the dough, roll it into the food wrap and cool down in the fridge for 10 minutes.
Make buns, put the filling inside
Bake for 25-30 minutes, until they are golden brown.
Buns will be tasty and bold. Have a nice meal.