Add all the stir fry sauce ingredients to a mixing bowl, whisking well.
Cut the salmon into 1 1/2 to 2-inch cubes, then place them in the mixing bowl with the sauce, and allow it to marinate for 10 to 15 minutes while you chop the vegetables.
Set a large cast iron pan or wok over medium-high heat. Heat 1 tablespoon oil, then sear the salmon in a single, even layer for 1-2 minutes per side, being sure not to overcook it. (Be careful not to stir the salmon or it will flake off. Use a fish spatula to gently flip the salmon.)
Transfer the salmon to a plate, cover with foil and set aside.
While the salmon is searing, transfer the marinade to a small saucepan set over medium heat. Bring the liquid to a simmer and allow it to reduce to a syrup for 4 to 5 minutes. Remove it from the heat and set it aside to cool and thicken slightly.
Heat the remaining oil in the pan. Add the bok choy, bell pepper, and zucchini and stir fry for 2 to 3 minutes.
Add the mushrooms, green beans, and white parts of the green onions. Stir fry for 1 to 2 minutes.
Stir in 1/4 cup of the stir fry sauce, tossing it with the vegetables until coated.
Add the salmon back to the pan, along with the thickened stir fry sauce, stirring until everything is coated and heated through.
Serve over rice, garnished with sesame seeds and green parts of the green onions.