Peanut Sesame Noodles

Purée dressing ingredients in a blender until smooth, about 2 minutes, then transfer to a large bowl.

Cook pasta in a 6- to 8-quart pot of boiling salted water

until tender.

Drain in a colander, then rinse well under cold water.

Add pasta, scallions, bell peppers, and sesame seeds to dressing, tossing to combine, and serve immediately.