Stuffed Mushrooms - cooking recipe

Ingredients

2 lb. fresh mushrooms
2 Tbsp. butter
1/3 c. onion, diced
1/2 c. mushroom stems, diced
1 small box frozen spinach
1/2 lb. Monterey Jack cheese, grated
1/2 lb. sausage (out of casing)

Preparation

Clean mushrooms, cutting off stems.
Saute onions and stems in butter.
Cook sausage and drain.