“I know this isn’t a traditional katsu, but when it tastes this good, are you really going to complain?” says telly chef Gordon Ramsay. “While you’re at it, make double of the tonkatsu sauce. It’s the Japanese equivalent of brown or steak sauce – sweet and tangy – and it goes brilliantly with burgers, pulled pork and bacon sandwiches, as well as the Japanese classic, pork tonkatsu. It will keep for at least a week if stored in the fridge in a sealed container.”

Tuna katsu sandwich
(Hodder & Stoughton/Jamie Orlando-Smith/PA)
Tuna katsu sandwich
Print Recipe
Nutrition Facts
Tuna katsu sandwich with ginger and apple slaw
Amount Per Serving
Calories 762 Calories from Fat 135
% Daily Value*
Fat 15g23%
Saturated Fat 4g25%
Trans Fat 1g
Polyunsaturated Fat 5g
Monounsaturated Fat 4g
Cholesterol 146mg49%
Sodium 2453mg107%
Potassium 1325mg38%
Carbohydrates 101g34%
Fiber 8g33%
Sugar 33g37%
Protein 57g114%
Vitamin A 4294IU86%
Vitamin C 52mg63%
Calcium 311mg31%
Iron 8mg44%
* Percent Daily Values are based on a 2000 calorie diet.

Tuna katsu sandwich with ginger and apple slaw

A sandwich full of flavour
Prep Time15 mins
Cook Time2 mins
Total Time17 mins
Course: Lunch, Snack
Cuisine: British
Servings: 2
Calories: 762kcal
Author: Gordon Ramsay


  • Heavy-based frying pan
  • Bowls


  • Vegetable oil, for frying
  • 2 tbsp (heaped) plain flour
  • 1 egg
  • 60 g panko breadcrumbs
  • Dash of milk
  • 2 170g thick tuna steaks
  • 180 g white cabbage
  • 60 g pickled ginger, plus a splash of the pickling liquid
  • 4 thick slices of white bloomer loaf crusts removed
  • Freshly ground black pepper

For the tonkatsu sauce:

  • 125 ml tomato ketchup
  • 2 tbsp soy sauce
  • 2 tbsp Worcestershire sauce
  • 2 tbsp mirin
  • 1 garlic clove peeled
  • Pinch of chilli flakes

To serve:

  • 1/2 green apple (optional)
  • 1 tsp toasted white sesame seeds or untoasted black sesame seeds (optional)
  • 1 lime cut into wedges


  • Place a heavy-based frying pan (skillet) over a high heat and coat the bottom of the pan with a thin layer of oil.
  • Put the flour, egg and panko breadcrumbs into three separate bowls. Season the flour with black pepper. Add a little milk to the egg and beat with a fork.
  • Dip each tuna steak in the flour, making sure it is well coated. Shake off any excess, then dip it in the egg followed by the breadcrumbs.
  • Place the steaks in the hot oil and cook for one minute on each side.
  • Meanwhile, finely slice the cabbage with a mandoline or the blade side of a box grater and combine in a bowl with the pickled ginger and pickling juice.
  • Make the tonkatsu sauce by combining the ketchup, soy sauce, Worcestershire sauce and mirin in a bowl. Grate in the garlic, add the chilli flakes and stir well.
  • To assemble each sandwich, spread the tonkatsu sauce on two slices of bread and top one of them with the cabbage slaw. Place the tuna steak on the slaw and sit the other slice of bread on top.
  • Finely slice the apple (if using) using a mandoline or sharp knife, then sprinkle with sesame seeds (if using).
  • Cut each sandwich in half and serve with the apple salad, lime wedges and any leftover tonkatsu sauce on the side.


Calories: 762kcal | Carbohydrates: 101g | Protein: 57g | Fat: 15g | Saturated Fat: 4g | Polyunsaturated Fat: 5g | Monounsaturated Fat: 4g | Trans Fat: 1g | Cholesterol: 146mg | Sodium: 2453mg | Potassium: 1325mg | Fiber: 8g | Sugar: 33g | Vitamin A: 4294IU | Vitamin C: 52mg | Calcium: 311mg | Iron: 8mg

Ramsay In 10 by Gordon Ramsay is published by Hodder & Stoughto. Photography Jamie Orlando-Smith. 

Ramsay in 10: Delicious Recipes Made in a Flash
  • Amazon Kindle Edition
  • Ramsay, Gordon (Author)
  • English (Publication Language)

Last update on 2021-11-26 / Affiliate links / Images from Amazon Product Advertising API

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