To make the salad: combine the Chinese cabbage, capsicum, carrot, shallots, cucumber, coriander, mint and dill in a large bowl. Set aside.
To make the dressing: combine the aioli, lemon juice and wholegrain mustard in a small bowl and mix well. Add the dressing to the salad ingredients and mix until the salad is well coated. Distribute the salad evenly amongst 4 plates.
To cook the salmon: heat a non-stick pan over medium heat. Cook the salmon for 3-4 minutes on each side or until cooked to your liking. Remove from the heat and allow to rest for a few minutes. Top each plate of salad with a salmon fillet and serve! Enjoy!