Mix together the orange zest, garlic, ginger, soy sauce and honey in a bowl. Add the duck strips and leave to marinate for up to 30 minutes.
Heat a wok over a high heat. Add the sesame seeds and toss around until they are lightly golden. Remove from the pan and return the pan to the heat. Add 1 tablespoon of the oil and when it is beginning to smoke, remove the duck from the marinade, leaving behind as much marinade in the dish as possible, and add to the wok. Stir-fry for a few minutes until it’s browned and sticky, and then transfer to a plate.
Add all the vegetables to the wok with a little extra oil if it looks like it needs it. Stir-fry for about 3 minutes. Mix the orange juice into the remaining marinade and pour in. Cook for a couple of minutes longer for the sauce to thicken and the vegetables to become almost tender. Return the duck to the wok, stir, and then spoon into bowls and scatter with the sesame seeds.
You can serve with rice or noodles if you desire or just enjoy it on its own.