A Mexican-style torta is just like a burrito, except the “wrapper” is a hollowed-out roll instead of a tortilla. Here it's filled with mashed spiced black beans and a quick guacamole. Take this vegetarian version to another level (and add calcium) by melting Monterey Jack cheese onto the bean side of the sandwich. Serve with: Grilled corn on the cob or Spanish rice. Download a Free Low-Calorie Lunch Cookbook!