Au Gratin Potatoes - cooking recipe

Ingredients

6 medium potatoes
1/4 cup margarine or butter
1 medium onion, chopped
1 Tbsp. all-purpose flour
1 tsp. salt
1/4 tsp. pepper
2 cups milk
2 cups shredded sharp cheddar cheese
1/4 cup fine dry bread crumbs

Preparation

Preheat oven to 375 degrees.