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Keto Sesame Tuna Steaks - Quick, Flavorful, and Low-Carb

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Prep Time 10 minutes
Cook Time 10 minutes
Total Time 20 minutes
Servings: 4 servings
Ingredients Method

Ingredients
  

  • 2 tuna steaks (about 6–8 oz each, 1-inch thick), sushi-grade if searing rare
  • 2 tablespoons sesame oil (toasted for stronger flavor)
  • 2 tablespoons sesame seeds (mix of white and black, if available)
  • 1 tablespoon tamari or coconut aminos (for gluten-free)
  • 1 teaspoon rice vinegar or apple cider vinegar
  • 1 teaspoon fresh grated ginger
  • 1 small garlic clove, finely grated
  • 1/2 teaspoon sea salt
  • 1/4 teaspoon black pepper
  • 1/4 teaspoon red pepper flakes (optional)
  • 1 tablespoon avocado oil (or another high-heat oil) for searing
  • Lemon or lime wedges, for serving
  • 2 green onions, thinly sliced (optional garnish)

Method
 

  1. Pat dry the tuna: Use paper towels to dry the tuna steaks well. This helps you get a great sear.
  2. Make the marinade: In a small bowl, mix sesame oil, tamari or coconut aminos, vinegar, ginger, garlic, salt, pepper, and red pepper flakes if using.
  3. Coat the tuna: Brush the marinade over both sides of the tuna. Let it sit for 5–10 minutes while you heat the pan.
  4. Press on sesame seeds: Spread sesame seeds on a plate. Press the tuna into the seeds to coat both sides evenly.
  5. Heat the pan: Set a heavy skillet (cast iron or stainless) over medium-high heat. Add avocado oil and let it shimmer.
  6. Sear the tuna: Place the steaks in the pan. Cook 45–90 seconds per side for rare to medium-rare. For medium, go up to 2 minutes per side. Avoid overcooking to keep it tender.
  7. Rest and slice: Transfer to a cutting board and rest 2 minutes. Slice against the grain if you want thin strips, or serve whole.
  8. Finish and serve: Squeeze fresh lemon or lime over the top and sprinkle green onions. Serve with a light salad or sautéed bok choy.