Crispy Rice Cakes:

• 1 batch crispy rice cakes (15 pieces)

Nobu Spicy Tuna:

• 225g / 7oz sashimi grade tuna, or salmon
• 1 tbsp sriracha
• 4 tsp kewpie mayonnaise
• 1 tsp sesame oil
• 1/4 tsp cooking salt
• 2 tbsp finely chopped green onion
• 1 tsp white sesame seeds
• 1/2 tsp black sesame seeds, divided

Creamy Spicy Canned Tuna Topping:

• 360g/12oz canned tuna in oil, drained
• 3 tbsp sriracha
• 4 tbsp kewpie mayonnaise
• 1 tbsp lemon juice
• 1 tsp sesame oil
• 1/2 tsp cooking/kosher salt
• 1/4 cup finely chopped green onion
• 2 tsp white sesame seeds, optional
• 1 1/2 tsp black sesame seeds, divided

• 1 avocado, cut into small thin slices
• 15 jalapeño slices, thin, optional garnish
• 1/2 tsp black sesame seeds, for garnish