Slow Cooker Amish Ham and Potato Casserole

Ingredients :

• Ham: 1 pound, cooked and diced

• Potatoes: 6 medium, peeled and thinly sliced

• Onion: 1 medium, chopped

• Cheddar Cheese: 2 cups, shredded

• Cream of Mushroom Soup: 1 can (10.5 oz)

• Milk: 1/2 cup

• Garlic Powder: 1/2 teaspoon

• Salt and Pepper: To taste

• Butter: 1 tablespoon, cut into small pieces