Servings: Makes 6 side-dish or 4 vegetarian main-course servings.

For peanut dressing
1/2 cup smooth peanut butter
1/4 cup soy sauce
1/3 cup warm water
1 tablespoon chopped peeled fresh ginger
1 medium garlic clove, chopped
2 tablespoons rice vinegar
1 1/2 tablespoons Asian toasted sesame oil
1 tablespoon honey
1 teaspoon dried hot red pepper flakes or a splash of the hot sauce or chili paste of your choice

For noodles
3/4 lb dried soba nooodles (dried linguine fini or spaghetti will work in a pinch)
4 scallions, thinly sliced
1 red bell pepper, cut into 1/8-inch-thick strips
1 yellow bell pepper, cut into 1/8-inch-thick strips
Half a seedless cucumber, thinly sliced
1 cup firm or extra-firm tofu, cubed
3 tablespoons sesame seeds, toasted