To make the poke. In a medium 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 cucumber salad. Toss together the cucumbers, rice vinegar, honey, and a pinch each of chili flakes and salt. To make the Spicy Mayo. In a small bowl, stir together the mayo, sriracha, honey, and soy sauce (or tamari). To assemble, add the rice to bowls, top with avocado, cucumber salad, poke, pickled ginger, green onions, and nori. Spoon over the spicy mayo. Sprinkle on the crumbs. Serve with additional spicy mayo.: You will notice a fragrant mix of toasted sesame and sharp ginger as the dressing meets the cubes of chilled tuna , and that aroma signals the flavors are marrying. The fish should glisten, not look dull, which tells you it is absorbing the sauce without breaking down. I like to gently fold with a spoon so the cubes stay intact, and then let it rest briefly while I prepare the rest. Common mistakes include over tossing, which can turn the texture mushy, or leaving it too long, which over seasons the fish. If the mixture smells overly salty, add a tiny squeeze of citrus or a touch of honey to rebalance.
To make the cucumber salad. Toss together the cucumbers, rice vinegar, honey, and a pinch each of chili flakes and salt.: As you toss, the cucumbers will give off a faint crunch and a clean, watery scent from the vinegar. The goal is a lightly pickled finish that brightens the bowl, not a soggy salad. I let the cucumbers sit for a few minutes so the flavors meld, and they will soften slightly while retaining snap. Avoid over salting, which can draw out too much water and make everything watery. If the salad seems too tart, add a whisper more honey .
To make the Spicy Mayo. In a small bowl, stir together the mayo, sriracha, honey, and soy sauce (or tamari).: The sauce should be glossy and have a balanced savory sweetness when you taste it. I stir until the sriracha streaks disappear and the texture becomes silky. The aroma will be creamy with a warm, garlicky edge from the hot sauce. A common slip is adding too much sriracha at once, which can overpower the rest of the bowl; always taste and adjust gradually.
To assemble, add the rice to bowls, top with avocado, cucumber salad, poke, pickled ginger, green onions, and nori.: You will feel the base of warm sushi rice under cool toppings, which is a pleasant temperature contrast that enhances flavor. Arrange the avocado slices so they sit gently on the rice, then place the cucumber salad and a neat mound of poke on top. The visual cue is a bowl with balanced colors and layers, not a single lump. A mistake people make is piling everything in one spot; instead distribute evenly so every bite includes multiple elements.
Spoon over the spicy mayo.: Drizzling the glossy spicy mayo across the top introduces a creamy, piquant ribbon that ties the bowl together. It should bead on the surface of the fish and rice, signaling it is the right thickness. If it sinks immediately, it may be too thin, so hold back and add in small amounts. Over saucing can hide the delicate tuna flavor, so taste as you go.
Sprinkle on the crumbs.: The fried shallot crumbs add a warm, nutty crunch and a toasted aroma that contrasts the soft components. Scatter them at the end so they remain crisp. When they hit the warm rice, you will hear a faint textural contrast and smell the toasty shallot. Do not add them too early or they will lose crunch and become limp.
Serve with additional spicy mayo.: Offering extra sauce on the side lets guests adjust heat and creaminess to their liking. The extra mayo adds a smooth mouthfeel and more color when spooned on. Keep an eye on salt levels, because additional mayo will amplify the sodium from the soy.
