Put the chicken chunks into a ziplock bag and pour the marinade over it. Carefully close the bag, squeezing out all the air and let it marinade for 30 mins to an hour.
Heat the oil in a pan with the stove turned on high, and when it's shimmering, carefully pour the contents of the bag, chicken and sauce and all into the pan. Be careful because it's going to splatter at this point.
Keep the heat high and allow the chicken to brown before carefully turning over each piece with tongs. Let both sides brown well.
Turn heat to low and put a lid on the pan so that the chicken can finish cooking under steam.
Give it about 3-5 minutes and check to see if done.
Use your tongs to get the pieces of chicken out so that you leave any extra oil and sauce in the pan. Normally we'd put it over rice and so you'd want that sauce, but since there's no rice in low carb eating, you may as well cut some sugar and oil by leaving the extra sauce in there.