Mix the ingredients for the marinade, cut the chicken breast into 2 cm cubes and marinate in the refrigerator for 2-3 hours.
Mix the ingredients for the sauce in a small bowl and set aside.
Divide the broccoli into small florets, cut the bell pepper into 2 cm pieces, dice the onion, dice the garlic finely.
Drain the marinade and pat the chicken breast cubes dry with kitchen paper. Heat 1 tablespoon of oil in a wok, fry the chicken breast cubes for 8-10 minutes while stirring and then set aside on a plate.
Heat another tablespoon of oil in the wok and stir-fry the broccoli, bell pepper and onions for 3 - 4 minutes. Add the garlic and chilli flakes and stir for 1 min. Reduce the heat, add the chicken breast cubes and sauce and reduce for 3 - 4 minutes while stirring. Turn off the heat and stir in the cashews.
Serve with jasmine rice and garnish with roasted sesame seeds and spring onions.