takeout-style sesame noodles with cucumber

Name: takeout-style sesame noodles with cucumber
Cuisine: Asian
Ingredients: 3/4 pound dried rice noodles (see notes up top); 2 tablespoons toasted sesame oil, plus a splash to loosen noodles; 2 tablespoons Chinese sesame paste or tahini (see note up top); 1 tablespoon smooth peanut butter; 3 1/2 tablespoons soy sauce; 2 tablespoons Chinese rice vinegar; 1 tablespoon granulated or brown sugar; 1 tablespoon finely grated ginger; 2 teaspoons minced garlic (from 1 medium-large clove); Chili-garlic paste, to taste; 1/2 pound cucumber, very thinly sliced; 1/2 cup roasted salted peanuts, roughly chopped; A handful of chopped fresh herbs, such as mint and cilantro, for garnish