String bean salad with double sesame dressing

1. Place wok or nonstick pan over high heat for about 1 minute, or until it smokes.
2. Add the sesame seeds.
3. Turn the heat to low, and dry cook for 3-5 minutes, or until brown.
4. Empty onto a flat plate.
5. Steami the string beans 3-5 minutes, or until they have softened but still have some crunch.
6. Remove and plunge them into a bowl of ice-cold water.
7. Drain, dry, remove stems ends and place in large bowl.
8. To make dressing, mix the vinegar, soy sauce, mustard sauce, sugar and sesame oil. When thick, add the garlic, scallions, and red and yellow peppers.
9. Add to string beans and mix well.
10. Sprinkle with toasted sesame seeds.