To make the Rice. Bring 3 cups water to a boil. Add the rice and a pinch salt. Stir to combine, cover, then turn the heat down to the lowest setting possible. Allow the rice to cook 10 minutes on low, then turn the heat off completely and let the rice sit, covered, for another 15 minutes. Fluff the rice with a fork.Mix the rice vinegar and granulated sugar. Microwave for 30 seconds to dissolve the sugar. Pour over the fluffed rice and mix until the rice becomes super sticky. Line a square pan with parchment paper, then pat the rice into the pan, packing it in tightly. Cover abd freeze 30 minutes, until cold, and can easily be sliced. After the rice is chilled, cut into squares or use a biscuit cookie cutter to make 4 circles. To make the Tuna: In a bowl, combine the tuna, soy sauce (or tamari), sesame chili oil, ginger, red pepper flakes, green onion, and sesame seeds. Toss to mix.To make the Spicy Mayo. In a bowl, stir together the mayo, sriracha, honey, and soy sauce (or tamari). To assemble: Heat the avocado oil in a large skillet. Add the rice cakes and fry until golden, about 5 minutes, then flip, and cook until golden all over, about 3-5 minutes. Drain. Season with salt. In a dry 1-cup measure, layer 1/4 cup of the tuna, the cucumber, then the avocado. Run a knife around the edge of the cup to loosen, then invert the cup onto the fried rice, carefully remove the cup. Repeat with the remaining ingredients to create 4 stacks total. Place each stack on a nori sheet. Top each with microgreens, wonton crisps (if desired), candied jalapeños, and sesame seeds. Serve with the spicy mayo.