Preheat Oven to 350°
Or preheat your grill to medium heat. Toss the mushrooms in a glass or stainless steel bowl with all the ingredients. Using a small roasting pan roast approximately 10 minutes or grill about 4 minutes on each sides. Remove the thyme sprigs and reserve mushrooms in a warm place.
In a glass bowl mix the cheeses, sundried tomatoes, garlic and chives. Fill each mushrooms with the cheese mixture and bake at 350° for about 5 minutes or until the mushroom are warm.
Top each Mushroom with the Arugula Salad