HEAT grill to medium-high heat.
COOK potatoes in boiling water 12 to 14 min. or until tender; drain. Cool slightly.
RESERVE half the dressing. Thread meat, accordion-style, onto 4 skewers, alternating potatoes and tomatoes between folds of meat; brush with remaining dressing.
GRILL 10 to 12 min. or until meat is done, turning occasionally and brushing with the reserved dressing for the last 2 min.