4 tablespoons of butter or margarine
1 onion, finely chopped
10 mushrooms, finely chopped
1 1/4 teaspoons of prepared mustard
2 tablespoons of parsley, finely chopped
2 tablespoons of chives, finely chopped
1/4 teaspoon of ground sage
3/4 cup of herb bread crumbs
1/2 - 1 cup of chicken stock
salt and pepper to taste
6 large slices of cold boiled or baked ham, 1/4 - 1/2 inch thick