Keep it simple. Specialty breads such as biscuits, croissants, and hoagies are usually higher in fat and calories than a bun or English muffin. Whatever you choose, it’s a good idea to take off the top and go with an open-face version. For the filling, opt for a lean protein, such as grilled chicken, deli turkey, or low-fat roast beef. Cheese packs in 100 calories per ounce, so skip it or stick with one slice. Then top it off with mustard or oil and vinegar along with fresh vegetables, lettuce, and tomato.