Start by running your tuna steaks under cool running water and patting them completely dry with paper towels. I cannot stress this enough—wet fish will steam instead of sear. Take your time here. Pat them dry, then pat again. The drier your fish, the better the crust. Slice each large steak in half lengthwise to create thinner pieces that cook evenly. You're aiming for about ½-inch thickness. Thicker pieces won't develop that beautiful crust without overcooking the interior.

In a small shallow bowl, combine your paprika, cayenne, ginger, sea salt, black pepper, oregano, fennel seeds (crushed between your fingers), and ground clove. Mix this thoroughly so the spices are evenly distributed. I use a small whisk and spend about thirty seconds on this step. Uneven spice distribution is the difference between a balanced dish and one that's too salty or too hot in certain spots. Set this mixture within arm's reach of your cooking station.

Place a cast iron skillet or heavy-bottomed stainless steel pan over high heat. This takes about three minutes. You know it's ready when you hold your hand about six inches above the surface and feel serious heat radiating back. The skillet should be so hot that when you add oil, it shimmers immediately. Open your kitchen windows or turn on your exhaust fan now—blackening requires high heat and will create some smoke. This is not a sign something's wrong; it's exactly what you want.

Working with two pieces at a time, brush both sides of your tuna steaks lightly with melted butter. Now press them firmly into your spice mixture, coating both sides generously. Press down so the spices adhere and don't just sit on top. This creates the actual crust, not just a coating. If your spices are falling off, your fish wasn't dry enough. Make a mental note for next time.

Carefully place your spiced tuna into the screaming-hot skillet. Do not move it. Let it sit for exactly ten seconds. Flip it. Let it sit for another ten seconds on the second side. You now have blackened ahi tuna with a pink, rare center. If you want it cooked through, go thirty seconds per side maximum. Any longer and you'll lose the tender texture that makes this special. Remove it to a clean plate immediately. The residual heat continues cooking the fish even after it leaves the pan.

Repeat this process with your remaining two pieces. Once all your tuna is cooked, let it cool to room temperature on a clean cutting board. This takes about ten minutes. Do not rush this step by putting hot fish directly into storage containers—the steam will make it watery and sad. While it cools, wipe out any spice bits from your skillet if you're cooking the full four pieces, or simply let it cool between batches.