Place meat in wine, oil, lemon jui:e and thyme; marinate 15 minutes on countertop.
Drain meat and reserve marinade.
Alternate veal, prunes, green peppers, celery and mint leaves on skewers; place on ovenproof plater.
Generously brush with marinade an 1 broil 10 minutes 6 in (15 cm) from top element.
Turn skewers over once and season during cooking.