Dive into an ocean of flavor with our Seared Tuna Tacos.

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Grab your swimsuit! We’re diving deep into the tasty world of Seared Tuna Tacos today. Imagine crunching into a crisp tortilla shell, biting into juicy seared ahi tuna, tasting the creamy diced avocado, and getting that zing from some citrus zest. It’s a catch worth waiting for.
Now, if you’re all about Mexican cuisine, you might say, “Hey, kinda reminds me of good old fish tacos.” And you would not be wrong. But the seared ahi tuna is the game changer here, making these hand-held delicacies stand out. It’s totally on par with our favorite Low-Carb Fish Taco Bowls and Shredded Chicken Tacos, but with a gourmet twist. So, ready to whip up this foodie fantasy? Let’s spill the beans on how to craft the most stellar Seared Tuna Tacos!
Does This Recipe Work With My Diet?
With this meal, you’re getting your lean protein and omega-3 fatty acids from the yummy ahi tuna. Add in a tasty avocado full of health benefits and a slice of zest from citrus fruits and girl, you’ve got yourself one heck of a nutrient-packed dish.
The dish is gluten-free (just be sure to get corn tortillas) and can be low-carb/keto friendly if you substitute lettuce leaves for the tortillas. Vegans/vegetarians will want to set aside the fish and use marinated tofu or tempeh. If you want to make this a Paleo-friendly dish, use lettuce for tortillas, coconut aminos instead of soy sauce, and coconut oil or ghee instead of vegetable oil.
INGREDIENTS
To make the tacos as I like to assemble them, here’s what you’ll need…
- 1/2 lb. ahi tuna steak
- 1/2 avocado, diced
- 1/2 lemon, zested and juiced
- 1/2 lime, zested and juiced
- 2 tbsp soy sauce
- 1/2 tbsp sesame oil
- 1 tbsp vegetable oil
- 1 small shallot, diced
- pinch of black pepper
- 1/2″ fresh ginger, grated
- handful coriander leaves
- 4 corn tortillas
- sesame seeds and lime wedges (for garnish)

INSTRUCTIONS
Whisk
In a small bowl, whisk together the zest and juice from the lemon and the lime. Whisk in the soy sauce, sesame oil, and grated ginger, and season with the black pepper.
Combine
In a separate bowl combine the avocado, chopped shallot, and season with a dash of lime juice. Mash lightly with a fork and set aside.
Marinate
Place the tuna steak in a plastic bag and pour the marinade over. Seal the bag and let it stand at room temperature for at least 15 minutes.
Sear
Heat the vegetable oil in a large skillet on MED-HIGH. Pat dry the tuna steaks with paper towels and place them in the hot skillet. Sear for 1 minute, then carefully flip over and sear for another minute.
Slice
Transfer the cooked tuna to a cutting board and thinly slice.
Assemble
Place the tortilla wraps on a clean surface. Spread the avocado over. Top with the sliced tuna.
Garnish
Garnish with coriander leaves, toasted sesame seeds, and lime wedges.
DEVOUR!
Tips & Tricks to Making Perfect Seared Tuna Tacos
- Choose tuna that smells clean and slightly briny, not fishy.
- When zesting your lemon and lime, take care only to scrape off the outermost layer of the skin.
- Sear your tuna on very high heat for just about a minute per side to seal in the juices.
- Let the tuna rest before slicing to redistribute the juices.

FAQs
Although you can use canned tuna if you’re in a bind, just be aware it won’t have that fresh flavor and firm texture that we’re really going for here.
If you’re more of a ‘mild salsa’ person, just skip or take it easy with the ginger and black pepper.
Try other seafoods, like salmon or even shrimp. For greens, ditch the coriander and sub in basil or mint. Add some heat with sliced jalapenos or give it a different crunch with diced radishes or shredded cabbage.
If you can’t get your hands on a griddle or skillet, no worries. You can still sear your tuna in a heavy-bottomed frying pan over HIGH heat.

Serving Suggestions
I like to pair these tacos with a crisp side salad or a refreshing coleslaw. But if that’s not your thing, try them with grilled veggies, sweet potato fries, or even a light gazpacho. Don’t forget a cold glass of a zesty Sauvignon Blanc or a fruity Margarita to complete the feast.
how to prep and store your tuna tacos
You can make the avocado goodness and marinade ahead of time. When you’re done, keep them in the fridge (separately, of course) until you’re ready to cook. Bundle any leftovers in the fridge. They should last for two days, just make sure to keep them in an airtight container. To heat them back up, play it gentle. Either a quick warm-up in a skillet or a zap in the microwave will do fine.


Ingredients
- 1/2 lb. ahi tuna steak
- 1/2 avocado diced
- 1/2 lemon zested and juiced
- 1/2 lime zested and juiced
- 2 tbsp soy sauce
- 1/2 tbsp sesame oil
- 1 tbsp vegetable oil
- 1 small shallot diced
- pinch of black pepper
- 1/2" fresh ginger grated
- bunch coriander leaves
- 4 flour or corn tortillas
- sesame seeds and lime wedges (for garnish)
Instructions
- In a small bowl, whisk together the zest and juice from the lemon and the lime. Whisk in the soy sauce, sesame oil, and grated ginger, and season with the black pepper.
- In a separate bowl combine the avocado, chopped shallot, and season with a dash of lime juice. Mash lightly with a fork and set aside.
- Place the tuna steak in a plastic bag and pour the marinade over. Seal the bag and let it stand at room temperature for at least 15 minutes.
- Heat the vegetable oil in a large skillet on MED-HIGH. Pat dry the tuna steaks with paper towels and place them in the hot skillet. Sear for 1 minute, then carefully flip over and sear for another minute.
- Transfer the cooked tuna to a cutting board and thinly slice.
- Place the tortilla wraps on a clean surface. Spread the avocado over. Top with the sliced tuna. Garnish with coriander leaves, toasted sesame seeds, and lime wedges.
Tips & Notes:
- When zesting your lemon and lime, take care only to scrape off the outermost layer of the skin.
- Sear your tuna on very high heat for just about a minute per side to seal in the juices.
- Let the tuna rest before slicing to redistribute the juices.
Nutrition Info:
Recipes written and produced on Food Faith Fitness are for informational purposes only.

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