Wash bok choy and cut into smaller pieces. I prefer to quarter mine.
To make the sauce, finely mince the garlic and ginger and add to a bowl together with 2 tsp sesame oil and soy sauce. Add the red pepper flakes (if using). Mix well and set aside.
Heat 1 tbsp of Sesame Oil in a skillet. Once hot, add the cut bok choy, placing them cut side down. Sauté each side until it turns golden brown in color. Keep flipping the bok choy until all sides are golden brown (a total of about 3-4 minutes).
Pour the sauce over the bok choy making sure to pour it into the crevices of the leaves. It really makes it flavorful! Cover the skillet with a lid and sauté a further 1-2 minutes, allowing the bok choy to steam a bit. Sauté longer if you want your bok choy to be softer. But it tastes best when it still has a crunch to it.