Crunchy Potato Balls    Sometimes I get tired of the same old chippy-dip appetizers when I take snacks to a party. This is a different bend on your usual snack-fare. Another good thing about this dish is you can use left over mashed potatoes.    2 cups very stiff mashed potatoes (I think you also could use instant potatoes)    2 cups finely chopped ham    1 cup (4 oz) shredded cheddar or Swiss cheese    1/3 cup ligh ...