Heat your wok over high heat, and add the oil. Add the garlic and red pepper to the wok and stir-fry for about 20 seconds. Add the onions and stir-fry until browned and slightly caramelized.
Toss in the soy sauce, dark soy sauce, oyster sauce, fish sauce, and sugar. Stir-fry for another few seconds, and then fold in the Thai basil until it’s just wilted. Serve with jasmine rice!