Stuffed Mushrooms

Wash mushrooms and remove stems. Mince stems and ham slices. Add onions to ham and stems. Take 2 T. of butter and melt (microwave or stove). Put all the mushroom caps in a ziploc bag and put warm, not hot, melted butter over them. Close bag and shake. Pour out onto to baking tray for microwave or stove. Melt 2 t. butter and add onion ham and stem mixture. Saute for 2 minutes. Spoon into caps. Top with romano or parmesan cheese. Mozzarella is especially good on top. Bake in 375 oven for 10 min or microwave for 2 to 3 min on high. Can be made in advance keep in fridge and microwave before serving.