Chicken Nanban (Ayam Goreng Saus Tartar)

Bahan-bahan (2 porsi)

• 1 boneless, skinless chicken breast ((10.5 oz, 300 g))
• 1 large egg (50 g w/o shell)
• 1 Tbsp all-purpose flour (plain flour) ((plus more, if needed))
• ⅛ tsp Diamond Crystal kosher salt
• ⅛ tsp freshly ground black pepper
• 2 cups neutral oil
• 2 Tbsp rice vinegar (unseasoned)
• 2 Tbsp soy sauce
• 1 Tbsp mirin
• 2 Tbsp sugar
• 1 large egg (50 g w/o shell)
• ½ Japanese or Persian cucumber
• ¼ onion ((1.8 oz, 50 g))
• 3 Tbsp Japanese Kewpie mayonnaise
• 1 tsp rice vinegar (unseasoned)
• ⅛ tsp Diamond Crystal kosher salt
• ⅛ tsp freshly ground black pepper