Artichoke Stuffed Mushrooms

Bahan-bahan (32 porsi)

• 1 tablespoon extra virgin olive oil
• 1 cup very finely chopped onion
• 40 large button mushrooms, (stems removed (mushrooms scooped out a bit))
• ¼ teaspoon salt
• ¼ teaspoon freshly ground black pepper
• 12 ounces marinated artichoke hearts, (drained and finely chopped)
• 8 ounces cream cheese, (at room temperature)
• 1 cup grated Parmesan cheese
• 2 tablespoons sour cream
• ½ teaspoon garlic salt
• chopped fresh parsley, (for garnish)