Soba Noodle-Vegetable Salad

• 4 ounces soba noodles, or whole-wheat spaghetti
• 1 large shallot, very thinly sliced
• 1 1/2 cups shredded carrot
• 1 red pepper, julienne
• 1/3 cup shredded fresh basil leaves
• 1/3 cup shredded fresh mint leaves
• 1 tablespoon chopped fresh cilantro leaves

Dressing:

• 1/4 cup rice vinegar
• 1 teaspoon sugar
• 1 tablespoon walnut oil (or canola oil)
• 1/2 teaspoon sesame oil
• 1 teaspoon finely minced garlic
• 1/2 teaspoon chili flakes
• 1/2 teaspoon lime zest
• 1 teaspoon lime juice
• 1/2 teaspoon fish sauce, or 1 teaspoon low-sodium soy sauce
• Salt
• 6 large Bibb lettuce leaves