Fresh Mushrooms and Swiss Chard Empanadas Dec 31, 1999 INGREDIENTS:Mushroom Filling: 2-3 Tbsp. unsalted butter 1 onion, diced 1 garlic clove, minced 1 lb. fresh white or oyster mushrooms, cleaned and roughly chopped 1 ½ tsp. salt ½ tsp. freshly ground black pepper 2...