Pour soy sauce into a bowl, add olive oil, liquid honey, mustard seeds, and spices. Thoroughly mix the marinade until smooth. You can use a whisk. Part of the sauce can be immediately reserved for serving.
Put chicken thighs into sauce filled bag, freezer Ziploc is best. Close the bag and refrigerate for 15 minutes. Cut carrots and bell peppers into strips, fry together in pan with a bit of olive oil with green beans for 7-8 minutes on medium heat, stirring occasionally.
Add chopped finely broccoli florets and stir fry for another 5 minutes. Then remove the vegetables from the pan when they are as tender but slightly al dente. Transfer the marinated chicken to the pan along with the marinade.
Cook and brown, stirring for 10 minutes or so until almost cooked thru. Transfer the vegetables to the pan and fry everything together for another 10 minutes until meat is cooked thru.