Ingredients
2 tablespoons olive oil
1 medium onion, sliced
2 cups beef broth
1 tablespoon Worcestershire sauce
1pound roast beef
Butter for rolls, softened
4 ciabatta rolls, split
Brown mustard or other good mustard
4 slices provolone cheese
Directions
Heat olive oil in a skillet over medium-high heat. Sauté onion until tender. Add beef broth and Worcestershire sauce. Add roast beef, and heat until warm.
Spread butter on ciabatta rolls. In a separate skillet, toast both sides of rolls until lightly brown. Spread each with mustard, placing 1 slice of cheese on all roll bottoms. Add beef and onions, and add roll tops.
Spoon broth into small bowls. Dip sandwiches in broth and enjoy.