This salad is a take on the Malaysian street snack.
Note Belacan is a shrimp paste available from Asian grocers. To roast, preheat oven to 180C, wrap belacan in foil and roast (10-15 minutes). Alternatively, because the belacan becomes very pungent during roasting, you can roast it outside on a barbecue. Tamarind concentrate is available from Asian grocers; it doesn't require soaking.