Cut the chicken breast into bite-size cubes.
Mix the tomato purée, honey, Worcestershire sauce and rosemary, then add the chicken pieces. Mix thoroughly.
Marinate in the refrigerator for 1-2 hours.
Meanwhile: If you're using wooden skewers, soak them in water for half an hour to prevent burning.
Prepare your BBQ or warm & oil your grill/griddle pan.
Season, then pull the chicken pieces and tomatoes alternately onto the skewers.
Brush the remaining sauce on the skewers, season, then grill or barbecue for about 10-15 minutes. Turn the skewers around a few times.
Serve it with salad or grilled vegetables - perhaps in pita.