Portabella Mushroom Burgers

4 portabella mushrooms
2 Tablespoons low-fat Italian dressing
4 whole grain burger buns
Toppings for burgers: sliced tomato, onion, lettuce, and pickles

Wash mushrooms quickly under cold running water. Dry immediately to prevent sogginess. Divide dressing between mushrooms and brush to cover all surfaces. Preheat grill and place a sheet of aluminum foil on grill surface. Place prepared mushrooms on foil and cook on medium-hot grill with rounded side down. Grill about five to eight minutes and turn carefully to cook other side until mushroom is easily pierced with a fork. Serve on warm buns with all your favorite burger toppings. Yields four.