HEAT grill to medium heat.
BRUSH chicken with dressing. Grill 6 to 8 min. on each side or until done (165ºF), brushing with 1/4 cup sauce for the last few minutes. Cut into strips.
SPOON remaining sauce down centers of tortillas; top with chicken, cheese and tomatoes. Fold in opposite sides of tortillas; roll up burrito-style.
GRILL, seam-sides down, 8 to 9 min. or until golden brown, turning after 5 min.