Tumis Ayam Bok Choy

Bahan-bahan (2 porsi)

• 1 boneless, skinless chicken breast ((11–12 oz, 300–350 g))
• ¼ tsp Diamond Crystal kosher salt
• ⅛ tsp freshly ground black pepper
• 2 Tbsp potato starch or cornstarch
• 1 head Shanghai bok choy ((large))
• 1 inch ginger ((or 1 tsp grated ginger used in the video))
• 2 Tbsp toasted sesame oil ((divided, for cooking))
• 1 Tbsp soy sauce
• 1 Tbsp mirin
• ¾ cup water
• 1 Tbsp oyster sauce
• 1 tsp potato starch or cornstarch
• 2 tsp water