Tuna Poke bowl with avocado

Name: Tuna Poke bowl with avocado
Prep time: 15 min
Total time: 15 min
Cuisine: American, Asian, Japanese
Ingredients: 2 spring onions; 2 tbsp. sesame oil; 4 tbsp. sesame oil; 5 cm (2 in) piece of fresh root ginger, greated; Pinch of chilli flakes; 2 tbsp. sesame seeds; 11 g sushi nori, cut into 2cm (3/4in) strips; 350 g (12oz) fresh tuna loin, cut into small chunks; 2 avocados, peeled, stoned and chopped; 3 little gem lettuce, leaves separated, to serve; Lime wedges, to serve