Method:

1. Combine all dressing ingredients in a small bowl and mix well. Set aside.

2. Thinly slice onion and place in a bowl of cold water. (see note)

3. Cook pasta al dente according to package directions. Run under cold water to stop cooking.

4. Cut cucumber in half lengthwise and remove seeds using a spoon. Slice into thin slices.

5. Toss all ingredients in a large bowl. Let sit at least 40 minutes before serving.