Broccoli Dip

1 medium onion, finely chopped
1 (4 ounce) can mushroom stems and pieces, drained
1 tablespoon butter
1 roll Kraft garlic cheese
1 can cream of mushroom soup
1 (10 ounce) box frozen chopped broccoli, cooked and drained
Dash of Worcestershire sauce, red hot sauce and red pepper sauce
Salt, to taste

Saut