Chicken meatballs with milk sauce

Debone the chicken meat and mince it. Add the grated yellow cheese and a little salt, mix the mince well and shape small meatballs. Roll them in the flour and fry in part of the heated butter. Dissolve the remaining flour in a little cold water, mix it with the yogurt and add it to the boiling chicken stock, stirring constantly until it thickens. Finally add the melted butter. Mash the boiled potatoes into a puree, which is mixed with the remaining butter. The finished dish is assembled by placing the meatballs on the mashed potatoes and sprinkling with parsley. The sauce is served separately.