A little cheddar adds flavor without adding too many calories. For even more flavor, use roast beef that has been rubbed with Italian seasonings.

Heat the oven to 350 F. Lightly coat a baking pan with cooking spray. Spray a frying pan with cooking spray.

Over medium heat, saute the peppers and onions until they soften, 3 to 5 minutes. Add the roast beef and saute for an additional 2 to 3 minutes.

Place 1/2 of the roast beef mixture on the bottom half of each bun. Place in the prepared baking dish. Top each bun with 2 tablespoons of the cheese. Bake until the cheese has melted, 2 to 4 minutes. Remove and add the top of bun and serve.

• 1/2 green pepper, thinly sliced
• 1/2 small onion, thinly sliced
• 6 ounces lean roast beef, shaved
• 2 whole-wheat buns
• 1/4 cup cheddar cheese, shredded