2 lbs. fresh mushrooms
1/2 c. chopped onion
1/2 c. butter
4 pkgs. frozen chopped spinach
2 tsp. salt
2 c. grated sharp cheese
Garlic salt to taste

Separate mushroom stems and caps. Saute mushrooms and onions in butter. Thaw spinach and press out water. Line an 8x11 inch casserole with spinach. Sprinkle with salt. Add onions and mushroom stems - place caps on top. Add cheese evenly over all and sprinkle with garlic salt. Bake 350 degrees for 30 minutes. (240 calories per serving) Serves 8.