1Spray 5- to 6-quart slow cooker with cooking spray. Mix frozen potatoes, cheese, soup and sour cream in cooker. Cut ham lengthwise in half; place ham on potato mixture.
2Cover and cook on low heat setting 5 to 6 hours or until potatoes are tender.
3Remove ham from cooker; place on cutting board. Gently stir potatoes well before serving. Cut ham into slices; serve with potatoes.