Potato Soup

INGREDIENTS

• 3 bacon slices
• 1 cup chopped onion
• 3 pounds baking potatoes, peeled and cut into 1/4-inch-thick slices
• Cooking spray
• 1/2 cup water
• 2 (14.5-ounce) cans fat-free, lower-sodium chicken broth
• 1/2 teaspoon salt
• 1/2 teaspoon freshly ground black pepper
• 2 cups 1% low-fat milk
• 4 ounces shredded reduced-fat sharp cheddar cheese (about 1 cup), divided
• 1/2 cup light sour cream
• 4 teaspoons chopped fresh chives