Cook bacon in medium nonstick skillet on medium heat until crisp. Remove bacon from skillet, reserving 4 tsp. drippings in skillet. Drain bacon on paper towels. Add eggs, 1 at a time, to drippings in skillet; cook 3 min. or until whites are firm and yolks are cooked to desired doneness.
Bring broth to simmer on medium-low heat in medium saucepan. Add roast beef; cook just until heated through, stirring occasionally. Drain roast beef; discard broth.
Spread barbecue sauce onto bottom halves of buns. Fill buns with roast beef, cheese, bacon and eggs.