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Seared Tuna Lettuce CupsThese Seared Tuna Lettuce Cups with Wasabi Aioli are a great pool-side summer dish that requires little cooking, it’s light and refreshing, and it’s freaking tasty! 

I must admit, Wasabi is one of the only foods I am not personally crazy about. Weird, I know– considering I pretty much eat everything this world has to offer + I love spicy food and Horseradish. However, when I was in Hawaii I had some Wasabi Aioli, which toned down the wasabi just enough for me to love it. 

Seared Tuna Lettuce Cups

I thought it would be fun to create an easy, poolside lettuce cup with an easy sesame seared tuna, crisp veggies, and a drizzle of wasabi aioli. It’s a simple combination that results in a fantastically flavorful summer meal. Enjoy!

Seared Tuna Lettuce Cups

If you like these Seared Tuna Lettuce Cups, try my Seared Tuna and Soba Noodle Stir Fry Bowls or Seared Tuna Salad with Pineapple-Sesame Dressing.

Seared Tuna Lettuce Cups
5 from 3 votes

Seared Tuna Lettuce Cups with Wasabi Aioli

Prep: 15 minutes
Cook: 5 minutes
Servings: 4


For the Wasabi Aioli:

  • 1/4 cup homemade mayo
  • 1 tsp wasabi powder I use Eden brand
  • 1 tsp hot water
  • 2 cloves garlic, minced
  • 1 tbsp lime juice
  • 1/4 tsp kosher salt

For the Tuna:

  • 2 6oz tuna steak filets
  • 1 tsp kosher salt
  • 1/2 tsp white sesame seeds
  • 1/2 tsp black sesame seeds
  • 2 tbsp avocado oil

For the Tacos:

  • 8 butter lettuce leaves
  • 1/2 avocado, sliced thin
  • 1/2 cup carrot, julienned
  • 1/2 cup cucumber, julienned
  • cilantro, for garnish


For the Wasabi Aioli:

  • In a small bowl, mix the wasabi powder and hot water. Let sit for 5 minutes.
  • In a bowl, combine the mayo, wasabi , garlic, lime juice and salt. Stir to combine. Set aside until you're ready to assemble your tacos.

For the Tuna:

  • Season the tuna steaks on all sides with kosher salt, white sesame seeds, and black sesame seeds,
  • Heat a non stick skillet over high heat with avocado oil.
  • When the oil is hot but not yet smoking, place the tuna steaks into the pan. Cook the tuna steaks for about 1 minute per side , depending on the doneness you prefer. I cooked mine for 30 seconds per side and I like mine pretty rare.

For the Tacos:

  • Assemble your lettuce cups, top with a drizzle of wasabi aioli and garnish with cilantro. Serve and enjoy!

Nutrition information is automatically calculated, so should only be used as an approximation.

Additional Info

Servings: 4

Welcome! I’m Alex.

I’m a food lover sharing healthy, simple, delicious, recipes from my kitchen to yours. Here you’ll find lots of Whole30, lots of healthy, and a little indulgence here and there because…it’s all about balance y’all!

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Recipe Rating


  1. 5 stars
    Total hit!!! The recipe comes together so quickly and was a great addition to our recipe rotation. I am never disappointed when a Defined Dish recipe is on the table