Saucy Steak Sandwiches Recipe - Cook With Campbells Canada

Ingredients

• 1 lb 454 g flat-iron or beef flank steak
• 2 tbsp 30 mL butter
• 2 large onion, sliced
• 1/2 tsp 3 mL salt
• 1/2 tsp 3 mL pepper
• 2 cups 500 mL Dijon-style mustard
• 4 Brioche rolls
• 4 Swiss cheese slices
• 1 cup 250 mL baby arugula
• 2 cups 500 mL Campbell's 30% Less Sodium Beef Broth with Red Wine