Cheddary Scalloped Potatoes

Ingredients:
2 Tbsp margarine
1 small onion, sliced
1 can (10 3/4 oz) Campbell's Broccoli Cheese Soup
1/4  cup Cheddar cheese
1/3 cup milk
1/8 tsp pepper
4 medium potatoes, cooked and sliced (about 3 1/2 cups)

Directions:
In a skillet over medium heat, add margarine and cook onions until tender.  Stir in soup, cheese, milk, and pepper.  Heat to boiling.  Add potatoes.  Reduce heat to low.  Cover, simmer 5 minutes or until hot and bubbling, stirring occasionally.  Serves 4.

Recipe from a magazine clipping...probably a Campbell's soup ad.