In a bowl, add red chili, sesame, Sichuan pepper and bouillon powder. Pour in hot oil (it should be hot enough to sizzle).
Next, add the soy sauce, peanut butter, brown sugar, rice vinegar, sesame oil and mix really well. Thin out the sauce with noodle water and add the noodles.
In a bowl, cook your noodles according to package instructions. I like to add salt here but you can also add salt to the sauce.
Add the noodles to your sauce and mix gently until each strand is coated really well. If preferred, add a little noodle water to make some broth but note that this may dilute your spice level too.
Garnish with green onion, sesame seeds and a very small amount of toasted and crushed Sichuan peppercorns because they are super potent! I just toast them in a pan gently and crush it in my mortar and pestle.