Spinach Stuffed Mushrooms

1 -6oz package Stove Top Stuffing Mix for Chicken
1 ½ cups Hot Water
40 Fresh Mushrooms (about 2 lbs)
2 Tbsp Butter (consider Smart Balance Butter)
2 Garlic Cloves Minced
1 -10oz package Frozen Chopped Spinach (thawed and well drained)
1 cup Shredded Part Skim Mozzarella Cheese
1 cup Grated Parmesan Cheese

Heat oven to 400 degrees. Mix together stuffing mix and water. Remove mushroom stems; chop stems. Melt butter in skillet. Add stems and garlic; cook and stir until tender. Add to stuffing with spinach and cheeses; mix well. Spoon into mushroom caps. Put on shallow baking pan. Bake 2o minutes until tender.