Healthy chicken stir fry

Name: Healthy chicken stir-fry
Ingredients: 65g brown basmati rice; 2 tsp rapeseed oil; 15g ginger, peeled and cut into thin matchsticks; 2 small red onions (160g), cut into wedges; 160g broccoli, broken into florets, stem finely chopped; 2 carrots (160g), halved lengthways, then cut into diagonal slices; 1 red chilli, finely chopped (optional); 200g chicken breast, cut into thin strips; ½ tsp ground cumin; 1 tbsp crunchy peanut butter; 1 tbsp wheat-free tamari; 1 tbsp brown rice vinegar