In a small mixing bowl, combine BBQ sauce, marmalade, honey, soy sauce, brown sugar, and black pepper. Whisk well.
Preheat the smoker to 375 degrees F for 15 minutes with the lid closed
Brush Salmon filets with orange BBQ sauce.
Wash and cut vegetables and add to a large mixing bowl. Add minced garlic, soy sauce, olive oil, black pepper, carrots, tomatoes, zucchini, bell pepper, and red onion to the bowl and stir to combine. Dump mixture onto a sheet of foil and form into a foil packet. Place directly onto the grill grate and cook for 10 minutes before adding salmon.
Place salmon directly onto the grill grate skin side down. Cook for 10 minutes, and brush again with orange BBQ sauce. Add orange slices directly onto the grill grate surrounding the salmon. Cook all for 10 more minutes. (Total cooking time foil packet: 30 minutes) (Total cooking time Salmon: 20 minutes) (Total cooking time orange slices: 10 minutes)
Check to be sure internal temperature of the salmon has reached 155 degrees F. Remove Salmon, foil packets, and orange slices from the grill.
Serve salmon with foil packet veggies. Top with sesame seeds and a grilled orange slice.