Rub the pork with oil and the freshly ground pepper and some salt or use your own favourite herb mix. Roast or grill the meat in a dry frying pan, grill pan or contact grill. Then put the meat aside for later use. Take a bowl and mix the chicken meat with salt and pepper, the five spices and let the flavors infuse for a while.
Boil the noodles to the package instructions and throw in the red pepper in the boiling water. Let the noodles drain (keep the red chili pepper). Mix the noodles in a big bowl with 2 tbsp of soy sauce, 1 tbsp of sweet soy sauce (or hoisin) 1 clove of crushed garlic and 1/2 a stock cube (pulverised). Stir through the noodles.
Stir fry the sliced onion with some oil in a big pan. After two or three minutes add the sliced leeks and concentrated tomato paste and bake them. Turn the heat down and let it simmer for a few minutes.
Turn the heat to high again and add the marinated chicken. Stir fry for a minute or three and add the remaining soy sauce, sweet soy sauce, garlic and the second half of the stock cube. Then add in the chili you used before with the noodles and let the sauce cook and thicken for about 6 to 7 minutes.
Remove the chili from the sauce and add the noodles. Hussle and stir fry everything. If it's too much for the pan, just stir fry everything in two badges.
Thinly slice the pork meat. Stir the finely sliced cilantro into the noodles and serve the noodles on a big plate with the pork slices on top.