Combine peanut butter, rice vinegar, red pepper, and oil in a bowl. Mix water, soy sauce, cider vinegar,and sugar then add to peanut butter mixture and mix well.

Cut the pork tenderloin into 3 inch length pieces. Then slice those pieces lengthwise into about 1/3" thick slices (so they end up the size of thick french fries). Place the meat into the peanut sauce and set aside.

Heat about 2 TB of oil in a hot wok (I like to use a mix of sesame and vegetable oil). Add meat strips and cook over high heat, folding the meat frequently. If sauce starts sticking to the wok, keep it scraped with a wood spoon before it starts to burn. Cook the meat until done, which should be about 5 minutes.

If the sauce is too thick, add a 1/4 cup of chicken broth mixed with 2 TB of teriyaki sauce.

Fold in green onions and noodles (feel free to add some extra peanut pieces or cashews).