Place 1 cup water into your Instant Pot Liner. Place cauliflower florets into a steamer basket, and place basket into liner. Close and lock lid, close vent on lid. Press Pressure Cook/Manual button for 0 minutes. Once done, do a QPR (quick pressure release). Press the Cancel button. You don't want it to be on warming.

Remove basket of cauliflower and set to side. Drain all water out of the pot, and allow to dry.

Let's prepare the sauce! In a small bowl whisk the soy sauce with the brown sugar, rice vinegar, cornstarch, ginger, red pepper flakes, and sesame oil.

Place liner back in Instant Pot. Press Sauté button and add vegetable oil to pot. Once heated, add in sliced onions and garlic. Cook for about 1 minute. Once done, add sauce mixture to pot, stir, and then add in cauliflower.

Gently stir cauliflower and until the sauce has thickened and caramelized. Remove from heat and finish with sesame seeds and green portions of scallions.