In A Small Bowl, Combine The Cream Cheese, Onion And Garlic. Transfer To A Serving Plate; Shape Into A 6-In. Disk. Set Aside. In A Small Saucepan, Combine The Butter, Brown Sugar, Worcestershire Sauce And Mustard. Cook And Stir Over Medium Heat For 4-5 Minutes Or Until Sugar Is Dissolved. Remove From The Heat; Stir In Pecans. Cool Slightly. Spoon Over Cheese Mixture. Serve With Crackers.