Ingredients

• 1/2 tablespoon wasabi powder or creamed horseradish
• 4 teaspoons water
• 3 tablespoons mayonnaise
• Pinch caster sugar (superfine)
• 2 tablespoons freshly ground cumin
• 2 tablespoons dried chile flakes
• 1 teaspoon freshly ground black pepper
• 1/2 teaspoon sea salt
• 1 pound beef fillet (tenderloin)
• 2 tablespoons groundnut oil
• 1 teaspoon Shaohsing rice wine or dry sherry
• 1 tablespoon light soy sauce
• 1 pinch sea salt
• 1 large handful fresh cilantro leaves and stalks, roughly chopped
• 1 spring onion, finely sliced
• Serving suggestion: Wheat flour pancakes, flatbreads or tortillas, for serving

Instructions

1. To make the mayo: In a small bowl, mix the wasabi powder with 1 teaspoon water to make a paste. Mix the wasabi paste, remaining water and mayonnaise together. Season with some sugar, and set aside.
2. To make the spicy coating: Mix all the ground cumin, dried chile flakes, black pepper, and salt, on a plate.
3. To make the beef: Prepare the fillet by hammering it with a meat mallet, or the side of a Chinese cleaver. Slice the beef into wafer-thin slices, and coat the pieces in the spice mix.
4. Heat a wok or pan over high heat and add the groundnut oil. Add the beef and stir-fry for less than 1 minute until browned and tender. As the beef starts to cook, pour in the rice wine or sherry, and season with the soy sauce, and a pinch of salt. Remove the wok from the heat and stir in the cilantro, and spring onions. Serve immediately. You can serve the spiced beef in steamed thin wheat flour pancakes, stuffed into warmed flatbreads or rolled in warmed tortilla wraps topped with plenty of wasabi mayo.