Start by gathering all the ingredients you will need.
In a small bowl, mix together the soy sauce, oyster sauce, Worcestershire sauce, fish sauce, sesame oil, and cayenne pepper to create the secret sauce.
In a skillet over medium heat, melt the butter.
Add the minced garlic to the skillet and cook, stirring, until it becomes fragrant, which should take about 1 minute.
Quickly add the secret sauce to the skillet and then turn off the heat.
In a large pot, bring lightly salted water to a boil.
Cook the spaghetti in the boiling water, stirring occasionally, until it is tender but still slightly firm to the bite, which will take about 12 minutes.
Using tongs, transfer the spaghetti into the skillet with the sauce, making sure to bring some of the cooking water along with it.
Toss the spaghetti in the sauce until it is well coated, then stir in the grated Parmigiano-Reggiano cheese.
If the noodles seem too dry, add a splash of the reserved pasta water.
Serve the noodles on plates, garnishing with chopped green onions and a sprinkle of red pepper flakes.
