Slow-Cooker Scalloped Potatoes and Ham

Ingredients

• 3 lbs. med. size potatoes peeled and sliced
• 1 onion chopped
• 1 cup shredded cheddar cheese
• 1 cup cooked ham or sliced smoked kielbasa
• 1 can (10 3/4 oz) reduced fat cream of mushroom soup
• 1/2 cup water