Recipe: Barbecued Portobello "Cheeseburgers"It's BBQ month and being a vegetarian doesn't mean there's nothing to enjoy hot off the grill!  Here's a mushroom and BBQ sauce "burger" that's hearty and savory! Summary: This savory summer vegetarian recipe is courtesy of Elizabeth Karmel. She's the author of "Taming the Flame" as well as the Executive Chef at