Sauté the chicken in the oil, salting it very lightly. When the pieces are just cooked through, put them in a container, cover and refrigerate until chilled.
Prepare the dressing. In a small bowl, add the pickled ginger juice, salt, the vinegar, chili flakes and olive oil. Stir so the flavors begin melding together. If you would like to add the lemongrass, for a subtle fascinating addition, do so now—peel the tough outer leaves and discard them, cut the lemongrass into two-inch pieces, crush them with the side of your knife and add to the dressing. Cover the dressing and set it aside. If you are starting this the night before, refrigerate. Before mixing the dressing into the salad, discard the lemongrass chunks.
Prepare the cucumber. After washing it, score the sides lengthwise with the tines of a fork. Continue all around the cucumber. Then cut the cucumber into thin slices. This gives the cucumber coins a handsome flowery look.
An hour before you intend to serve, put a platter in the refrigerator to chill it (see Kitchen Notes).
Assemble the salad. First, slice the chicken into bite-sized fairly uniform pieces and place them in a bowl. In that same bowl, add the sliced bell pepper, cucumber coins, roasted cashews, about a cup of the crispy rice sticks if you are using them, the coconut flakes, almost all the coriander leaves, and the pickled ginger. Toss with your hands to make sure everything is evenly mixed. Once the solids are mixed together in the bowl, stream in the dressing and mix with a big spoon. Then take the chilled platter out of the fridge and make a bed of Mesclun on it. Heap the chicken salad attractively onto the lettuce leaves. Garnish with a few coriander leaves and serve.
This is very nice with a crisp white wine, or, as Tropp would say: have it with a good cold beer.