MAKE THE SUSHI RICE
Rinse the sushi rice for a minute or two until the water runs clear. If you have time, soak it in water for 15 minutes prior to rinsing.
Add 3 cups of water to a pot over high heat and bring to a boil. Add the salt and rice and once boiling, lower the heat and cover to simmer for 20 minutes. After, turn off the heat but leave covered for 10 more minutes. Then fluff it up.
In a small bowl, add the rice vinegar, granulated sugar, and sesame oil. Microwave for 30 seconds or quickly warm it up in a pot just so the sugar dissolves.
Pour this over the rice and mix so that each grain of rice is coated evenly. It should be very sticky!
Line an 8x8 pan or larger with Saran wrap and tightly pack the rice to desired thickness. Cover tightly and pop in the fridge to chill for 1 to 2 hours or overnight. To save time, chill in the freezer for 30 minutes just until it is cold and easily can be sliced.
After the rice is chilled and set, cut into squares or rectangles.
To a large pan, add a little vegetable oil over medium high heat. Once the oil is very hot, add the rice squares and shallow fry in batches to not over-crowd them. Once the bottom is golden, flip over and allow the other side to become golden while making sure to flip carefully to not break it.
Remove from oil and transfer to a wire rack or paper towel to drain any excess oil.
MAKE THE SPICY TUNA
To a bowl, add the finely diced tuna along with mayonnaise, sriracha, soy sauce, sesame oil, lime juice, and sliced green onions. Mix together.
HOW TO ASSEMBLE
Add thinly sliced avocado on top of the fried rice. You can leave it sliced and unseasoned or mash it with a little salt and black pepper and add on top.
Add about 1 to 2 tablespoons of the spicy tuna on top. Then add a drizzle of spicy mayo on top along a sprinkle of sesame seeds and enjoy!