Spicy Garlic Noodles

Name: Spicy Garlic Noodles
Ingredients: 800 grams (28 ounces) Fresh udon noodles; 1 teaspoon of sriracha (or to taste); 1 tablespoon light soy sauce; 1 tablespoon brown sugar; 1 teaspoon sesame oil; Salt (to taste.); 1-2 red chilis (deseeded and roughly chopped); 2 tablespoons neutral flavored oil (such as vegetable oil); 1 teaspoon (2-3 cloves) minced garlic; 1 teaspoon minced ginger; 1 ½ teaspoons red pepper flakes (chili flakes, optional); Green onions (spring onions finely chopped, to garnish, optional); Lightly toasted sesame seeds (to garnish, optional)