HEAT oil in large skillet on medium-high heat. Season chops with pepper. Add to skillet; cook 3 min. on each side or until browned on both sides. Remove from skillet; cover to keep warm.
ADD onions to skillet; cook 2 min., stirring occasionally. Stir in garlic; cook and stir 1 min. Add all remaining ingredients except chops and nuts; stir. Bring to boil; simmer on medium-low heat 5 min. or until sauce is thickened.
RETURN chops to skillet; turn to evenly coat with sauce. Simmer 2 min. or until chops are done (145ºF). Remove from heat. Let stand 3 min. before serving topped with sauce and nuts.