Mince the onion. Mince the mushrooms, and the chicken together.
Cook the onion in 4 Tbsp of melted butter. When onions are done add the chicken-mushroom mixture and cook for 5 minutes aqdding salt & pepper to taste.
Remove frm the heat and stirin the sour cream and the nutmeg.
Preheat the oven to 400° F.
Spoon the chicken mixture into 4 ramekins and sprinkle with grated cheese. bake for 10 minutes the serve hot.
Servings: 4