1Make the spicy cucumber salad by thinly slicing a cucumber and mixing it with soy sauce, rice wine vinegar and chilli flakes.
2Prepare the nduja sauce by mixing Kewpie mayo, lemon zest and juice, nduja paste and honey.
3Make the chicken by marinating chicken in rice wine vinegar, soy sauce and ginger for 30 mins.
4Mix flour, cornflour, cayenne pepper, salt and pepper.
5Add soda water to the dry mix to make a wet batter, and slowly add the mixture to hot oil to fry the chicken.
6Make the Gochujang sauce by mixing Gochujang paste and honey.
7Toss the fried chicken in the Gochujang sauce.
8Assemble the sandwich by layering nduja sauce, chicken, more Gochujang sauce, chives and sesame seeds, cheddar cheese and finally cucumber slices between toasted bread.