Steps

1. Wash 4 lettuce leaves, tear into bite-sized pieces, and drain.
   🕒 04:55
2. Cut 260g chicken thighs in half and butterfly any thicker parts with a knife to ensure even thickness.
   🕒 07:33
3. Place the cut chicken thighs in a bowl, add 4 pinches salt, 4 dashes MSG(Ajinomoto) (MSG), black pepper to taste, 8 dashes oregano, 6 dashes garlic powder, and 2 tsp mayonnaise, then massage well into the chicken.
   🕒 08:18
4. Let the massaged chicken sit for about 10 minutes to absorb the flavors.
   🕒 10:03
5. To the bowl with the seasoned chicken, add 30g potato starch, 30g all-purpose flour, 4 pinches salt, 2 tsp soy sauce, 6 dashes MSG(Ajinomoto) (MSG), 6 dashes garlic powder, 6 dashes oregano, black pepper to taste, and 3 tbsp sparkling water, then mix well.
   🕒 12:05
6. If the batter is too thick, gradually add more sparkling water to adjust. [Pro Tip!] Adding sparkling water results in a super crispy coating.
   🕒 14:06
7. In a separate bowl, mix together 50g mayonnaise, 2 pinches salt, 4 dashes MSG(Ajinomoto) (MSG), 1 tsp lemon juice, 6 dashes oregano, 6 dashes garlic powder, and black pepper to taste to make the sauce.
   🕒 15:46
8. Lightly toast 4 slices of bread.
   🕒 18:52
9. Pour oil (1cm deep in the pot) into a pot and heat over medium heat.
   🕒 19:05
10. Carefully place the coated chicken into the hot oil and deep-fry slowly over medium heat, being careful not to burn it.
    🕒 19:23
11. Remove the fried chicken once, and let it rest for a few minutes to cook through with residual heat. [Pro Tip!] Resting the chicken once prevents the coating from becoming too hard and ensures it's cooked thoroughly inside.
    🕒 22:25
12. Return the rested chicken to the oil and deep-fry a second time over medium heat until the coating is super crispy.
    🕒 23:55
13. Spread the prepared sauce evenly onto the toasted bread.
    🕒 26:55
14. Place lettuce and the fried chicken on the sauced bread.
    🕒 27:16
15. Cover with another slice of bread and lightly press.
    🕒 27:25
16. Wrap the chicken filet sandwich using parchment paper.
    🕒 27:49