Add the scallions, onion, mint chile flakes, vinegar and a few generous twists of black pepper. Hold off on the salt for now. Toss to blend the ingredients. Taste and adjust with more chile flakes, black pepper, vinegar and salt if needed. Wen the flavor of the salad is exciting and balanced, add 1/4 olive oil and toss. Taste and add more oil if needed to balance the flavors. You want plenty of “dressing” pooling in the bottom of the bowl; the cucumbers will continue to drink that up, plus you want the juices to run into the other elements on your plate, such as grilled pork. Serve with a sprinkle of finishing salt if you like for some crunch.