Heat oven to 350° Grease rectangular pan, 13x9". Cook and stir mushrooms, onion and worcestershire sauce in 2tbsp butter in 10" skillet til brown. Mix baking mix and 1/2 °C butter in small bowl. Add water; beat til soft dough forms. Spread dough in pan. Spread cream cheese over dough. Top w/ mushroom mix and parmesan. Bake til crust is golden brown, 20-25min. Cut in about 1-1/2" squares. Refrigerate any remaining appetizers. 54 appetizers.
