Ingredient:

• 4 pounds potatoes, peeled and cut into 3/4-inch pieces
• 1/4 cup butter
• 1 small onion, chopped
• 1/4 cup all-purpose flour
• 2 cups 2% milk
• 2 cups shredded cheddar cheese
• 1 teaspoon salt
• 1/2 teaspoon pepper
• 2 cups cubed fully cooked ham