Toasted California Walnut, Tuna and Pink Grapefruit Poke - California Walnuts

Ingredients

• 130 g cucumber
• 150 g sushi rice
• 2 tbsp rice vinegar
• 2 tbsp mirin
• 2 tbsp sesame oil
• 2 tbsp soya sauce
• 1 tbsp caster sugar
• Juice and zest of 2 limes
• 2 tbsp mayonnaise
• ½ a tsp of wasabi paste
• 250 g fresh tuna (cut into bite sized chunks)
• ½ an avocado (cubed)
• 80 g California walnuts (toasted)
• 1 green chilli (finely sliced and deseeded)
• 1 pink grapefruit (peeled and segmented with a sharp knife)
• A handful of Asian micro herbs or rocket leaves
• Salt