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Simple Asian Tuna Steak Marinade

Close-up of a perfectly seared tuna steak, rare in the center, showing a dark spice crust.

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This recipe provides a quick, flavorful marinade perfect for searing or grilling tuna steaks, offering deep umami notes.

Ingredients

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  • 1/4 cup low sodium soy sauce
  • 2 tablespoons rice vinegar
  • 1 tablespoon sesame oil
  • 1 tablespoon fresh ginger, grated
  • 2 cloves garlic, minced
  • 1 teaspoon brown sugar
  • 1/2 teaspoon red pepper flakes (optional)

Instructions

  1. In a medium bowl, whisk together the soy sauce, rice vinegar, sesame oil, grated ginger, minced garlic, brown sugar, and red pepper flakes until the sugar dissolves.
  2. Place your tuna steaks in a resealable plastic bag or a shallow dish.
  3. Pour the marinade over the tuna, ensuring all sides are coated.
  4. Seal the bag or cover the dish.
  5. Refrigerate the tuna for 15 to 30 minutes. Do not marinate longer than 30 minutes to prevent the acid from changing the texture of the raw fish.
  6. Remove the tuna from the marinade and pat it dry with paper towels before cooking. Discard the remaining marinade.
  7. Grill or sear the tuna steaks to your desired doneness.

Notes

  • For a gluten free tuna marinade, substitute tamari for the soy sauce.
  • This marinade works well for Mahi Mahi steak if you need a substitute flavor profile.
  • Always pat the tuna dry before searing; excess moisture prevents a good crust from forming.

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