HEAT oven to 400ºF.
HEAT large nonstick skillet on medium heat. Add meat; cook 5 min. or until browned on all sides, turning occasionally. Transfer meat to 13x9-inch baking dish, reserving drippings in skillet. Mix mustard and thyme; spread onto meat.
BAKE 20 to 25 min. or until done (160ºF). Transfer to carving board; tent with foil. Let stand 5 min. Meanwhile, prepare stuffing as directed on package, reducing margarine to 1 Tbsp.
ADD broth to same skillet. Bring to boil on high heat. Add cream cheese spread; cook on medium-low heat 2 min. or until cream cheese is completely melted and sauce is well blended, stirring constantly.
CUT meat into thin slices. Serve topped with cream cheese sauce along with the stuffing and beans.