Prep 15 min Total 1 hr 5 min Servings 8 Original Bisquick® mix provides a simple addition to this Philly beef and cheese sandwich – a scrumptious dinner! Ingredients 1 medium bell pepper, cut into strips 1 medium onion, thinly sliced 4 cups Original Bisquick™ mix 2 cups milk 2 tablespoons mayonnaise or salad dressing