Tuna Steak

Quick answer

Total time: 16 min
Level: Medium
Servings: 2 servings
Ingredients: 5

About this dish

Chamchi steak is a pan-seared fresh tuna dish where a thick block of tuna is seasoned with olive oil, salt, and black pepper, then pressed onto a smoking-hot pan for under thirty seconds per side.

This extreme brevity is deliberate: it produces a dark, caramelized Maillard crust on the surface while leaving the interior a vivid, translucent pink that is barely cooked through. Temperature control is the central technique - if the pan is not hot enough, the tuna releases moisture and steams rather than sears, so the oil should be at the point of just-visible smoke before the fish goes in. A squeeze of lemon at the end brightens the rich, iron-forward flavor of the raw center.

Ingredients (2 servings)

Ingredient	Amount	Unit
tuna steak	300	g
olive oil	2	tbsp
salt	0.5	tsp
black pepper	0.5	tsp
lemon	1	piece

Instructions

Read the steps as a cooking flow: prep, heat, seasoning, doneness control, and finish.

6 steps

1

Heat

Just before cooking, pat the 300g tuna steak completely dry on the top, bottom, and sides with paper towels.

If the surface stays wet, the fish will steam before a brown crust can form.
2

Season

Sprinkle 0.5 teaspoon salt and 0.5 teaspoon black pepper evenly over both faces of the tuna.

Rub 2 tablespoons olive oil in a thin coat over the surface so no dry patches touch the pan.
3

Control

Heat the pan over high heat until the oil on the tuna would smoke lightly on contact and the pan looks fully hot.

Do not add the fish early, because a merely warm pan pulls moisture from the tuna.
4

Step

Place the tuna in the center of the pan and sear the first side for only 20 to 30 seconds, pressing gently for full contact.

Flip as soon as a deep brown band appears around the edge.
5

Step

Sear the second side for another 20 to 30 seconds, then hold any thick edges upright with tongs for about 5 seconds each.

The center should still look vivid pink, not opaque gray.
6

Finish

Turn off the heat, move the tuna to a board, and squeeze lemon juice evenly over the surface.

Slice it into 1.5 to 2cm pieces so the rare center shows, then serve while the crust is warm.

Practical Cooking Checks

The cues that matter most while cooking.

Key technique: A thick tuna block seared under 30 seconds per side at maximum heat forms a Maillard crust while keeping the center pink.
Finish cue: The center should still look vivid pink, not opaque gray.
Avoid this: Do not add the fish early, because a merely warm pan pulls moisture from the tuna.

Cooking decision evidence

Calculated Charim data and applicable official food safety guidance.

This recipe

16min, 5 ingredients

Category median

30min, 8 ingredients

Based on 194 recipes

Official safety guidance

Safe temperature

Check that the thickest part of the fish reaches 63°C. Without a thermometer, the flesh should no longer look translucent and should separate easily with a fork.

Source: FoodSafety.gov. Safe Minimum Internal Temperatures
Storage and reheating

Refrigerate leftovers in shallow containers within 2 hours and use them within 3 to 4 days. Reheat the center to 74°C.

Source: USDA Food Safety and Inspection Service. Leftovers and Food Safety

Sources checked 2026-08-03

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