Wash your produce. Slice your onions, Bok Choy, carrots, pepper - set aside. Mince garlic. Set aside also.
Dice the pork and add to a large gallon ziplock with half of the dark soy sauce and sesame oil. Mix until well combined.
Using the sauté setting on the Instant Pot, add 1 Tbsp oil of your choice. Add the pork to the pot and sauté until golden brown. Remove the meat, set aside.
Add minced garlic to the Instant Pot; brown for 30 seconds. Add water to the instant pot and de-glaze by scraping clean with a spatula.
Break the spaghetti in half. Put down in a crisscross pattern (helps prevent sticking). Do not stir or move the noodles once down. Gently push the pasta down so it is under the liquid
Close the Instant Pot; cook on high pressure for 4 minutes. Immediately release the pressure and allow to rest for 4 minutes.
Open the pot; stir the noodles around. Gently add the soy sauce (dark and light), hoisin sauce, and mirin to the noodles and stir until combined.
Turn on the sauté setting. Add the sliced Bok choy, red bell pepper, onions, carrots, and pork to the pot and stir frequently for about 5-8 minutes. (Depending on how crispy you like your vegetables.)
Garnish - salt, pepper, and sesame seeds (to taste). Serve hot.