Marinate the pork slices with dark soy sauce and the sesame oil mentioned above in the "For Marinating the Pork" section. Either keep it in the fridge over-night or just flash marinate while you chop the veggies.
Set the Instant Pot on SAUTE function & keep it on NORMAL. Add 2 tbsp oil and when the oil is moderately hot gently release the marinated pork and saute until the meat is lightly golden or light brown around the edges. Set aside.
In the same pot add more 2 tbsp oil and saute the garlic for just 30 seconds. CANCEL the SAUTE function.
Add the liquid and de-glaze the pot very well scraping the bottom and the sides of the pot with the help of a spatula. This will prevent the BURN error!
Add the halved spaghetti noodles in a bird nest pattern (fan or zig zag pattern, refer the recipe Video below, very helpful). DO NOT add the noodles all at once and do not STIR or mix the Noodles after adding them to the liquid. Instead, gently press the noodles with the help of a spatula just to coat them with the liquid.
Put the lid of the Instant Pot, seal the VALVE and PRESSURE COOK on HIGH for 4 mins for al dente noodles. **Check NOTES below for softer noodles.
Once the cooking cycle is over the Instant Pot will begin to beep. Wait for 3 mins of Natural Pressure Release and than release the rest of the pressure manually by moving the valve from the SEALING to the VENTING position. CANCEL the pressure cook function.
Now, with the help of a pair of forks de-tangle the pressure cooked noodles gently. If there's a little trace of liquid in the pot don't worry the noodles will suck it all up.