Cook the rice

• Rinse the sushi rice until the water runs clear.
• Cook the rice with the water in a covered saucepan until tender, then let it steam off the heat.

Season the rice

• Warm the rice vinegar with the sugar and salt until dissolved.
• Fold the vinegar mixture into the warm rice and let it cool to room temperature.

Make the spicy crab filling

• Shred the crab sticks.
• Mix the mayonnaise and sriracha with the crab sticks.

Toast the sesame seeds

• Toast the sesame seeds in a dry frying pan until golden and fragrant.

Roll the sushi

• Lay a nori sheet on the bamboo mat and spread the seasoned rice over it.
• Add the spicy crab, cucumber sticks and a few avocado slices, then roll tightly with the mat.
• Repeat with the remaining nori and filling.

Top with avocado

• Fan the remaining avocado slices over the top of each roll.
• Press gently so the avocado adheres, then sprinkle with toasted sesame seeds.

Slice and serve

• Slice each roll with a wet knife.
• Serve with soy sauce.