Vegan Peanut Noodles

Name: Vegan Peanut Noodles
Ingredients: 10.5 oz udon noodles (300 g); 1/2 large zucchini (or 1 small) (aka courgette); 1 large carrot (finely sliced); 1 yellow bell pepper (finely sliced); 1 red bell pepper (finely sliced); 1/2 cup smooth peanut butter (4 oz, 110 g); 1/4 cup tamari soya sauce (60 ml); 1/4 cup rice vinegar (60 ml); 1 tablespoon toasted sesame oil (14 ml); 2 tablespoons sriracha hot sauce (28 ml); 1 tablespoon brown sugar or maple syrup (optional); 1/4 cup cold water (60 ml); crunchy peanuts; sliced green onions (spring onions); sesame seeds; fresh cilantro (coriander)