Portobello Mushroom Burger

4 Portobello Mushroom Caps (stems trimmed)
Salt and Pepper
4 Slices Cheddar
4 Green Leaf Lettuce Leaves
4 Slices Tomato
4 Whole Wheat Hamburger Buns

Preheat broiler to high and set oven rak to second highest position. Line a baking sheet with heavy duty foil. Mist mushroom caps with cooking spray and sprinkle with salt and pepper. Place on baking sheet and broil until softened and browned, turning once, about 10 minutes total. Place a slice of cheese on rounded side of each cap and broil until cheese is bubbling. Place lettuce leaf and tomaot slice on bottom half of each bun. Top with a mushroom cap and the other half of bun. Serve immediately.