Begin by tidying your kitchen and gathering all ingredients and tools you'll need, including a bamboo sushi mat, sharp knife, and a bowl of water for sealing.

Rinse your sushi rice under cold water until the water runs clear. Combine the rinsed rice with 1.5 cups of water in a medium saucepan over high heat. Once it reaches a boil, reduce the heat to low, cover, and let it simmer for 20 minutes until the water is absorbed. Allow the rice to cool for 10 minutes.

While the rice is cooling, drain the canned tuna and place it in a mixing bowl. Add mayonnaise and sriracha to the tuna, stirring until you achieve a creamy consistency.

Lay a sheet of nori, shiny side down, on the bamboo mat. With wet fingers, spread an even layer of sushi rice across the nori, leaving about 1 inch of space at the top edge for sealing later.

In the center of the rice-covered nori, place a generous line of your prepared tuna mixture, followed by strips of cucumber or other fillings.

Starting from the bottom edge of the bamboo mat, carefully roll the sushi away from you, applying gentle pressure. Wet the bare edge with water to help seal the roll.

With your knife dipped in water, cut the roll into 6-8 equal pieces. Keep your knife clean between cuts.

Use edible ink markers to draw spooky designs on each sushi piece after slicing for added festive flair.

Arrange your completed Halloween Sushi on a platter, serving with soy sauce or your favorite dipping sauces.