INGREDIENTS
4
slices Sara Lee Artesano Bread
2 tbsp
butter, softened
2 tbsp
mayo
1/2 tsp
dijon mustard
4
slices Swiss cheese
4
slices provolone cheese
1/3 cup
freshly grated parmesan cheese
1/2
yellow onion (thinly sliced)
2 cups
beef broth
salt and pepper
1 tbsp
flour
2 tbsp
water