Sesame Soy Grilled Tuna

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Sesame Soy Grilled Tuna that tastes just like your favorite restaurant but is made at home. Don't be intimidated to cook this easy grilled or pan seared tuna at home for a healthy and delicious dinner.

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This Sesame Soy Grilled Tuna with an Asian marinade with soy sauce, rice vinegar, garlic, and ginger makes a perfectly grilled tuna steak that is full of flavor. It's great with Sesame Soy EdamameAsian Zucchini Noodles, or this Asian Kale Salad.

This easy grilled tuna with Asian flavors is as good as you would get in any restaurant and doesn't come with a huge price tag like the restaurant dishes normally do.

It's marinated in a simple blend of soy sauce, rice vinegar, garlic, ginger, green onions, and sesame oil. This adds tons of flavor to the dish without adding a heavy sauce or oil-rich marinade. It can be cooked on an outdoor grill, on a grill pan, or even pan-seared. It's so good and really couldn't be simpler to make. This Sesame Crusted Tuna is another delicious option.

Before we talk about this grilled tuna steak recipe, let's talk about the elephant in the room - cooking almost raw tuna at home. When I first made this recipe and shared it on Instagram, so many of you reported you would be scared to make this dish at home. But you shouldn't be!

As long as you are buying the right fish, you can definitely cook medium rare or rare tuna at home just like you would get in your favorite sushi restaurant.

It's easy, fast, and a really healthy option for dinner. If you prefer things cooked all the way, that's an option too. This tuna recipe will work for barely cooked tuna or fully cooked tuna.

Sliced grilled ahi tuna with sesame seeds, green onions, and soy sauce on a plate with salad greens.

A Quick Guide to Buying Tuna

Since buying fresh tuna can be expensive and a little scary for some, especially if you are preparing it raw or almost raw, it's important to know what to look for when buying tuna steaks.

  • Type of tuna: There are lots of different types of tuna and most can be enjoyed raw or just seared on the outside. Ahi tuna, also known as yellowfin tuna, is probably the most popular but you can also look for bluefin, bigeye, or albacore tuna. Most stores sell tuna as steaks and many times, these ahi tuna steaks are cut to order from a large loin piece. Look for sashimi-grade tuna if you are cooking it rare.
  • Color: The color of the tuna should a deep red to pink color and should be shiny and almost translucent. Different species will vary slightly in color but they all should have a rich pink to red color. The tuna should never be brown or matte looking. This normally means it is getting older. Another sign of age is any gaps in the tuna steaks. They should be a nice whole piece.
  • Smell: Fresh tuna should always have a fresh ocean smell, but shouldn't smell overly fishy. 
  • Previously frozen: Almost all tuna sold in grocery stores and fish markets has been flash frozen at sea to preserve freshness. So unless you are buying tuna that has just been caught, it is almost always previously frozen.
  • Frozen: You can buy frozen tuna steaks and defrost them yourself at home. Just make sure to buy high-quality fish. 
  • Markets:  Whenever in doubt, make sure to buy your tuna steaks at a quality market where you can count on the freshness or from a fishmonger if there is one available. Many grocery stores have fish counters with knowledgeable staff that can ease your fears about buying fresh tuna.

How do you know when a tuna steak is done?

If you are cooking a tuna steak to medium rare, many times the best way to make sure you don't overcook it is to use a timer. To get medium rare tuna, it will only take between 2-3 minutes per side since you are just looking to sear the outside of the fish.

Always make sure to use a very hot pan or grill and the tuna will naturally release when it is seared and ready to flip. If you want your tuna more cooked, you could cook it for about 5-6 minutes per side. Tuna gets dry quickly, so beware of overcooking it.

What spice blends and seasonings go with tuna steaks?

There are tons of different spice blends, seasoning, and marinade options when it comes to tuna. If you don't want to use the Asian marinade I suggested in the recipe, you can try all kinds of other combinations.

Almost anything that would work as a crust for steak will work for tuna. Just make sure to not use anything too strong that will overpower the fish. Here is one of my favorite simple tuna steak seasoning blends.

Tuna Steak Seasoning

  • 2 tbsp paprika
  • 1 tbsp cumin
  • 1/2 tbsp chili powder
  • 1 teaspoon garlic powder
  • 1/2 teaspoon onion powder 
  • 1/2 tsp thyme
  • 1/2 teaspoon kosher salt
  • 1/2 teaspoon pepper

Other delicious tuna seasoning and marinade options include sesame seeds, fresh ginger, fresh garlic, and lemon juice.

Grilled ahi tuna cooked rare and sliced on two plates with greens and a pepper relish.

How do I pan sear tuna steaks?

If you want to pan-sear the tuna steaks instead of cook them on the grill, you can follow the exact same instructions but cook the tuna in a heavy pan or a cast-iron skillet. Make sure to add some high-heat oil (like vegetable oil, not olive oil) to the pan first.

Once it is nice and hot, add the tuna and cook for 2-3 minutes on each side. Let the tuna rest 5 minutes before serving. Here is a great guide for pan-searing tuna.

Can I keep leftover tuna in the fridge?

This tuna will keep well in the fridge for 2-3 days after it has been cooked. It doesn't reheat very well so it is best to serve it cold or chilled. It is delicious in salads, poke bowls, over rice, or with cold Asian noodles. It also makes great tacos and lettuce wraps.

Frequently Asked Questions

Here are the most common questions about grilling tuna.

The exact cooking time for tuna will depend on the thickness of the fish and the doneness you prefer. Generally speaking, 

  • Rare: about 1-1.5 minutes per side
  • Medium Rare: 1.5-2 minutes per side
  • Medium: 2-2.5 minutes per side
  • Medium well: 3 minutes per side
  • Well done: 3-4 minutes per side (maybe longer if very thick)

To ensure the fish cooks evenly, it is best to flip the tuna while cooking it so it can sear on both sides. Make sure to oil the grill grates to ensure the tuna won't stick to the grill. If things tend to stick to your grill, cook the tuna steak on a piece of foil to ensure it doesn't stick. 

As long as the tuna is sashimi grade, it does not need to be cooked all the way through. In fact, tuna can be very dry when cooked all the way through, so it is best to cook it rare to medium. 

There are so many options for side dishes for grilled tuna. Normally I like to make grilled vegetables or a salad so I am not cooking indoors and outdoors. Tuna also pairs well well with steamed rice or quinoa.

If you prefer cooking the tuna steaks in foil, simply place the steaks on a piece of foil directly on the grill. Do not wrap the tuna in the foil or it will steam and cook through. The foil is sued to help prevent the tuna from sticking to the grill grates.

Grilled slice ahi tuna with sesame seeds, soy sauce, and green onions on two plates with greens.
The Recipe
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Sesame Soy Grilled Tuna

PREP TIME: 2 Hours
TOTAL TIME: 2 Hours, 10 Min
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  • 1/3 cup low sodium soy sauce
  • 3 tbsp rice vinegar
  • 2 green onions, chopped
  • 1 garlic clove, minced
  • 2 tsp sesame oil
  • 1 tsp ginger, minced
  • 1/2 tsp black pepper
  • 24 oz ahi tuna steaks (about 6 oz each piece)
  • 1 tbsp sesame seeds

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Combine the soy sauce, rice vinegar, green onions, garlic, sesame oil, ginger, and pepper.

Soy sauce, green onions, garlic, ginger, and green onions being stirred in a bowl.

Marinate the tuna in this mixture in the refrigerator for at least 30 minutes, two hours or more is ideal. If you can, remove the tuna from the fridge twenty minutes before cooking so it can come to room temperature.

Ahi tuna steaks marinating in a bowl.

When ready to cook, remove the tuna from the marinade, brushing off any green onions. Brush the grill with oil or spray with cooking spray. Cook the tuna for about 2 minutes on each side for medium rare. For medium well, cook about 4 minutes on each side.

Ahi tuna being cooked on a grill pan.

Let rest for five minutes and slice with a sharp knife. Sprinkle with sesame seeds and serve.

Grilled tuna being sliced on a wooden cutting board.
Nutritional Facts
Serving Size: 6 oz.
Amount Per Serving
Calories 237
Calories from Fat 39
% Daily Value *
Total Fat 4g
Saturated Fat 1g
Monounsaturated Fat 0g
Polyunsaturated Fat 0g
Cholesterol 66mg
Sodium 787mg
Total Carbohydrate 4g
Dietary Fiber 1g
Sugars 1g
Protein 43g

* Percent Daily Values are based on a 2,000 calorie diet. Your daily values may be higher or lower depending on your calorie needs.

The Nutritional Values provided are estimates only and may vary based on the preparation method.

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About the author Meet Kristen McCaffrey
Hi, I’m the cookbook author, recipe developer, and food enthusiast behind Slender Kitchen. I am obsessed with making healthy food that is easy to prepare and absolutely delicious. Meal planning is my secret weapon and I hope I can make meal time easier for you with our tried and tested recipes and foolproof meal plans. Learn More
1 Comment
On Sesame Soy Grilled Tuna
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Garret F.
August 30, 2022 - 17:51
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This was so easy and delicious. The ahi tuna came out perfectly rare with a nice crust on the outside. I was nervous about cooking such am expensive fish at home but it worked out great.
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