Tempura Ayam (Toriten)

Bahan-bahan (2 porsi)

• ¾ lb boneless, skinless chicken breast
• 1 knob ginger ((1 inch, 2.5 cm))
• 1 clove garlic
• freshly ground black pepper
• ¼ tsp Diamond Crystal kosher salt
• 1 tsp sake
• 2 tsp soy sauce
• 1 large egg (50 g w/o shell)
• ⅓ cup cake flour
• ⅓ cup potato starch or cornstarch
• ⅓ cup water
• neutral oil
• ponzu
• Japanese Karashi hot mustard