CUT meat crosswise into eight slices. Pound meat slices, cut-side up, with meat mallet to 1/2-inch thickness. Add to large nonstick skillet sprayed with cooking spray. Cook on medium-high heat 3 min. on each side or until browned on both sides. Reduce heat to low.

COMBINE dressing and mustard; pour over meat. Continue cooking 3 min. on each side or until meat is cooked through and sauce is thickened. Meanwhile, prepare stuffing as directed on package, reducing margarine to 1 Tbsp. and adding cranberries to the water along with the stuffing mix.

SPOON stuffing onto serving plates. Add meat; drizzle with sauce.