Italian-Style Stuffed Mushrooms

Ingredients
2 lbs. large mushrooms (about 2-in. ea.)
1/2 cup (1 stick) I Can't Believe It's Not Butter!® Spread
1/3 cup chopped onion(s)
1 tablespoon chopped garlic
1 cup Italian seasoned dry bread crumbs
2/3 cup shredded mozzarella cheese (about 2-1/2 oz.)
1/4 cup grated Parmesan cheese
2 tablespoons chopped fresh parsley
1 tablespoon red wine vinegar
1/8 teaspoon ground black pepper
1/4 teaspoon salt

Directions
1. Preheat oven to 400°. Remove and chop mushroom stems.
2. In 12-inch skillet, melt I Can't Believe It's Not Butter! Spread over medium-high heat and cook mushroom stems and onion, stirring occasionally, 5 minutes or until tender. Add garlic and cook 30 seconds. In medium bowl, pour mushroom mixture over bread crumbs. Stir in cheeses, parsley, vinegar and pepper.
3. Sprinkle mushroom caps with salt. On baking sheet, arrange mushroom caps; evenly spoon mushroom mixture into mushroom caps. Bake 25 minutes or until mushrooms are tender and golden.