Cook spinach briefly in hot water, drain and chop.
Mix with sour cream; 1/2 c. EACH shredded cheddar,
Monterey Jack and Parmesan; onion tops;
1/2 tsp. salt and herb seasoning.
Place mushrooms, cut side up, in center of baking dish.
Spoon spinach mixture around edges.
Saute' ground beef lightly with sliced green onions
and 1 tsp. salt. Spoon over mushrooms.
Top with 1/2 c. EACH shredded cheddar and
Monterey Jack cheeses. Sprinkle lightly with nutmeg.
Bake covered in 350F for 25 min. Serves 4.