In a hot pan add 3 tablespoons of vegetable oil, cook your meat 2 min per side, and reserve.
In the same pan add garlic, ginger they will cook fast 1 min then add onions, pepper or "Ají Amarillo" and Ají Amarillo paste, Stir fry and let it cook for about 2 min.
After that add tomatoes, the cooked meat, pasta/noodles, soy sauce, oyster sauce, vinegar, beef stock and let it cook for 1 min then turn off the heat add salt pepper, cilantro, sesame oil, give it a good stir and its good to go!