Make marinade by mixing ingredients together. Put chops in a shallow bowl or tray, pour marinade over, turning chops to make sure they are coated all over, and leave to stand for at least 30 mins.
To make salad, put the fish sauce, lime juice and 1 tbsp water into a small bowl, add the sugar, then mix until dissolved. Stir in chili. Put cucumber in a serving dish, sprinkle mint over, pour dressing over.
Heat the barbecue or griddle pan and cook chops on each side for 4-5 mins, until cooked. Serve with cucumber salad.