Wash 1 pound baby bok choy thoroughly to remove any dirt or grit between the leaves. Trim off the root ends and slice them in half.
In a large pan or wok, heat 1 tbsp vegetable oil oil over medium-high heat until it’s hot and shimmering.
Add the minced garlic and ginger to the pan. Sauté for about 1-2 minutes until fragrant, stirring constantly to prevent burning.
Add the prepared bok choy to the pan. Stir-fry for 5-7 minutes, tossing occasionally. You want the stalks to become tender yet still slightly crunchy, and the leaves to wilt but not become soggy.
Once the bok choy is cooked, stir in 1 tbsp soy sauce, 1 tsp mirin, and 1/2 tbsp rice vinegar. Stir to coat the bok choy evenly, allowing the flavors to meld together.
Drizzle 1/4 tsp toasted sesame oil over the bok choy and toss it well to ensure every piece is coated.
Remove from heat and transfer to a serving plate. Sprinkle with toasted sesame seeds for an added crunch and a hint of nuttiness.