Nikkei Beef Picanha with Yuzu, Soy and Chilli

Ingredients

• 1.3kg Irish beef picanha, whole piece
• 50g rock sea salt (do not use table or cooking salt or flakes)
• 120ml soy sauce
• 60ml extra-virgin olive oil
• 60ml yuzu, juice (substitute with lime or lemon)
• 6 garlic cloves, crushed
• 1 long red chilli, de-seeded and finely diced (keep ¬? for decoration)
• Edible flowers like wild garlic, to decorate
• Micro coriander, to decorate
• ¬? long red chilli, de-seeded and finely diced, to decorate (see above)