Kombu & Charred Habanero-Cured Seared Yellowfin Tuna Bowl

Instructions

1. 1

   Rinse 1 cup jasmine rice in cold water until clear, then drain. Heat a medium saucepan over medium heat with 1 tsp toasted sesame oil, and sauté 2 cloves garlic for 1 minute until fragrant and lightly golden. Add the drained rice, stirring to coat the grains for 1 minute. Pour in 1 1/4 cups dashi broth and 1/4 tsp kosher salt. Bring to a rolling boil, cover with a tight-fitting lid, turn heat to lowest setting, and cook undisturbed for 14 minutes.

   16 min

   Tip: Toasting the garlic in sesame oil before adding the dashi creates an aromatic foundation that anchors the citrus-heavy components later.

2. 2

   In a small bowl, whisk together 1 tsp kombu powder, 1/4 tsp charred habanero powder, 1 tsp kosher salt, and 1 tsp turbinado sugar. Pat the 12 oz sushi-grade yellowfin tuna loin completely dry with paper towels. Rub the spice mixture evenly across all sides of the tuna block. Place on a wire rack over a plate and transfer to the refrigerator to cure uncovered for 12 minutes.

   14 min

   Tip: Keep the curing window strictly around 10 to 12 minutes—any longer and the salt pulls out too much moisture, toughening the delicate flesh.

3. 3

   In a medium bowl, toss 1 Persian cucumber and 3 red radishes with 2 tbsp unseasoned rice vinegar, 1 tsp mirin, and 1/4 tsp kosher salt. Gently massage with clean fingertips to encourage quick osmosis, then set aside in the fridge to lightly pickle while you make the sauce.

   5 min

   Tip: Thin slices mean this sunomono achieves pickled perfection in under ten minutes without losing its snappy textural integrity.

4. 4

   In a small mixing bowl or glass jar, whisk together 3 tbsp fresh mango purée, 2 tbsp soy sauce, 1 tbsp fresh lime juice, 1 tbsp yuzu juice, and 1 tsp grated fresh ginger until emulsified and glossy. Set aside at room temperature.

   4 min

   Tip: The tropical sweetness of mango tempers the smoke of charred habanero and elevates the naturally floral acidity of yuzu.

5. 5

   Remove the cured tuna from the refrigerator. Quickly rinse off surface cure under a gentle trickle of ice-cold water, then pat thoroughly dry with paper towels. Place the tuna block in the freezer for 4 minutes to chill the exterior—this allows for an intense sear without cooking the core.

   5 min

   Tip: Moisture is the enemy of a crisp crust; take 30 extra seconds to ensure the tuna's surface is bone-dry before searing.

6. 6

   When the rice timer finishes, turn off the heat, lift the lid to lay a clean tea towel over the pot, replace the lid, and let it rest undisturbed for 5 minutes. Then fluff gently with a fork or rice paddle.

   6 min

   Tip: The tea towel traps condensation and prevents it from dripping back into the grains, yielding distinct, fluffy grains.

7. 7

   Set a heavy cast iron or carbon steel skillet over high heat until wisps of smoke appear. Add 1 tbsp neutral high-heat oil, swirling to coat. Sear 12 oz sushi-grade yellowfin tuna loin hard for 30 to 40 seconds per side, including the narrow edges, until an opaque 1mm crust forms while the center stays deeply ruby and raw. Immediately transfer to a cutting board.

   3 min

   Tip: Resist the urge to move the block while it touches the skillet; let the direct contact produce that caramelization instantly.

8. 8

   Using a very sharp knife pulled smoothly in a single stroke, slice the seared tuna against the grain into 1/4-inch thick slices. Divide the warm garlic-dashi rice between two wide shallow bowls. Fan the seared tuna on one side and 1 ripe avocado on the other. Mound the drained cucumber-radish pickle alongside, spoon the mango-ponzu generously over the tuna, and garnish with 1 tsp toasted white sesame seeds and 2 scallions.

   5 min

   Tip: Wiping your knife blade with a damp towel between cuts keeps the slices sharp, clean, and restaurant-gorgeous.