How to Make It
Combine rice vinegar, oyster sauce, and sugar in a small bowl. Heat canola oil in a skillet over medium-high. Add bok choy; cook until browned, about 4 minutes.
Reduce heat to medium; cover and cook until tender, about 3 minutes. Add garlic; cook 1 minute. Add oyster sauce mixture and unsalted butter; cook, stirring occasionally, 1 minute. Sprinkle with fresh basil.