Preheat grill or broiler. Remove fat from pork and cut the pork nearly in half lengthwise and open like a book. The pork should not be cut all the way through.
Salt and pepper the pork and press the crushed garlic onto the meat on both sides. Combine the honey, soy sauce and mustard. If using the broiler, place vegetables on a large foil-lined tray and broil for 8 to 10 minutes. Turn vegetables over, place pork on tray and spoon half the honey-mustard sauce over it. Broil 7 minutes with the vegetables.
If using a grill, place vegetables on grill grate and cook about 8 to 10 minutes. Turn vegetables over, place pork on grill and spoon half the honey-mustard sauce over it. Grill pork 7 minutes with the vegetables.
Remove both from grill or broiler; slice pork on an angle. Serve pork with the remaining sauce spooned over the sliced pieces.