Slice the potatoes into thin slices. Spray the slow-cooker pan with non-stick cooking spray. Mix the remaining ingredients, excluding the ham, in a medium bowl, set aside. Layer half of the potatoes and half the ham in the slow-cooker, pour half the soup mixture over and spread on, repeat layers. Cover and cook on high for 3 1/2 hours or until fork-tender. Turn slow-cooker to low and continue cooking 30 minutes or until ready to serve.