Stuffed Mushrooms - cooking recipe

Ingredients

20 medium size mushrooms
1/3 c. butter
3 Tbsp. chopped onions
1/2 c. Parmesan cheese
1/2 tsp. salt
1/8 tsp. garlic salt

Preparation

Finely chop mushroom stems; saute with onions in butter for 3 to 4 minutes.
Add remaining ingredients.
Fill mushroom caps with mixture.
Put in greased baking dish.
Bake at 350\u00b0 for 30 minutes.