To make the choi sum: Toss the choi sum leaves, sugar snap peas, carrots, red bell pepper, yellow bell pepper
, pineapple, and spring onions
together in a large serving bowl.
To make the dressing: Mix the groundnut
oil, pineapple juice, light soy sauce, rice vinegar, and black pepper in a small bowl, and stir well. Then, pour the dressing mixture over the salad just before serving. Toss well, and serve immediately.