Seperate the noodles. If they have been refrigerated, steam them in a bowl for a few minutes until soft enough to separate.
In a small bowl, combine the soy sauce, seasoning sauce, sweet soy sauce, and sugar.
Heat a wok to high heat. Add the oil. As soon as it smokes, add the garlic and chilli. Stir fry about 15-20 seconds, until garlic begins to brown. Add the onions and stir fry for thirty seconds before adding the protein and stir frying for another minute.
Add the noodles, sauce, tomatoes, and green peppercorns, stir frying to coat every strand of noodle. Leave to cook for a minute or two, allowing the noodles to absorb the sauce. Flip and cook for another minute or two.
Turn off the heat and add the holy basil, quickly stirring to wilt. Serve immediately with chilli vinegar.