Preheat your oven to 200°C (400°F). Line a baking tray with parchment paper and spread the cooled rice evenly in a thin layer.
Drizzle the rice with soy sauce, sesame oil, and olive oil. Toss gently to coat, then spread it back into an even layer.
Bake for about 45–50 minutes, stirring every 15 minutes to ensure even crisping. The rice should turn golden and slightly chewy with crispy edges.
While the rice is baking, combine mayonnaise, soy sauce, rice wine vinegar, sesame oil, honey, and sriracha in a bowl.
Whisk until the mixture becomes smooth and creamy. Taste and adjust sweetness or spice if needed.
Set the dressing aside in the fridge until ready to use. Keeping it chilled enhances the flavor.
Drain the tuna thoroughly to avoid excess moisture in the salad. Flake it gently with a fork into bite-sized pieces.
Slice the cucumbers, thaw the edamame, dice the avocado, and slice the spring onions. Prepare everything before assembling.
Keep the avocado separate until the final mixing step to prevent browning.
In a large bowl, combine the crispy rice, tuna, cucumbers, edamame, and spring onions. Toss gently to mix.
Add the diced avocado carefully so it stays intact. Pour over the dressing just before serving.
Sprinkle with black sesame seeds and add chilli crisp or jalapeño if desired. Serve immediately for maximum crunch.