Toss cabbage, green onions and cucumber together in large non-reactive bowl. Keep chilled while preparing dressing.
Combine chili, garlic, curry powder, sugar, oil and vinegar in covered container. Whisk or shake to combine.
Just before serving add peanuts and cilantro to the cabbage, pour dressing over all, toss lightly to combine.
Salad does not keep well for very long, so do not dress until just prior to serving. It doesn't actually go bad, but the peanuts and cabbage soften and it's just not as good as fresh made. If taking to a pot luck or similar affair, I bring the dressing in a separate container to add at the last minute.