Spoon or pipe the cheese mixture into the mushroom caps. Garnish with pimento. Place on platter, wrap and refrigerate until serving time. These may be made a day in advance. Onion, Minced 4 tb Margarine or butter Wash mushrooms and remove stems.
Mince stems and ham slices.
Add onions to ham and stems. Take 2 T. of butter and melt. Put all the mushroom caps in a ziploc bag and put warm, not hot, melted butter over them. Pour out onto to baking tray for microwave or stove. Melt 2 t. butter and add onion ham and stem mixture.