Slice the buns (if using) and spread both sides with the vegan mayo.
2 soft bread rolls, 4 tablespoon vegan mayonnaise
Place the shredded cabbage in a small bowl and dress with the lemon juice.
150 g sweetheart cabbage, Juice of half a lemon
To Make the Chicken Katsu
Place a vegan chicken fillet on a piece of baking parchment and fold over to cover. Use a rolling pin to gently tap the fillet until it has flattened into a slightly larger piece. Repeat with the second fillet. If using my vegan chicken recipe, tofu or oyster mushrooms, skip this step.
2 vegan chicken fillets
In a medium bowl, whisk together the plain white flour, cornflour and fine sea salt. In a separate medium bowl whisk together the vegan yoghurt, plant milk and sriracha. In a third medium bowl place the panko breadcrumbs.
30 g plain white flour, 1 tablespoon cornflour, 1 teaspoon fine sea salt, 40 g vegan yoghurt, 120 ml plant milk, 1 tablespoon sriracha, 80 g panko breadcrumbs
Place a fillet in bowl 1 with the flour mixture. Make sure it's completely covered on both sides, flipping as necessary.
Remove the fillet from bowl 1 and dunk in the yoghurt mixture in bowl 2. Again, flip the fillet to make sure it's coated on both sides.
Finally, dunk the fillet in bowl 3 with the panko breadcrumbs. Scoop breadcrumbs over the top to coat before flipping and patting gently into the breadcrumbs to ensure it's fully coated.
Set the coated fillet aside on a plate and repeat the process with the second fillet.
Place a medium, non-stick frying pan or cast-iron skillet over medium heat and add the vegetable oil. Once hot, carefully lower the fillets into the oil - they should sizzle immediately. Fry for roughly 3-5 minutes on each side or until golden brown and crispy.
4 tablespoon vegetable oil
Remove from the frying pan and place on a piece of kitchen roll to catch any residual oil.
To Make the Sandwich
Divide the shredded cabbage between the two buns.
Transfer each fried fillet to the prepared buns then top immediately with tonkotsu sauce. Close the sandwich and serve.
Tonkotsu sauce
Notes
1. In the images for this recipe I used store-bought vegan chicken fillets from a company called The Vegetarian Butcher. If you don't have access to store-bought vegan chicken fillets, don't worry! You can use my vegan chicken recipe. Alternatively, pressed, firm tofu works great, or you could try with a flat cluster of oyster mushrooms.