Seared Tuna Steak with Wasabi-Green Onion Mayo

The first time I had tuna seared to perfection was at a tiny sushi bar tucked away in a San Francisco alley. The chef, a quiet, intense man, treated each slice with reverence. What struck me wasn’t just the quality of the fish, but the vibrant, piquant sauce that accompanied it – a wasabi-infused mayonnaise that danced on my tongue. It was an epiphany, a flavor combination that elevated simple seared tuna to something truly extraordinary, and it’s a memory I still cherish every time I recreate this dish.

Recipe Overview

• Prep Time: 15 minutes
• Cook Time: 4 minutes
• Total Time: Several hours (including marinating)
• Servings: 4
• Dietary Type: Pescatarian

Ingredients

• For the Wasabi-Green Onion Mayo:
  • ¼ cup mayonnaise
  • ¼ cup sour cream (or use all mayonnaise)
  • 2 tablespoons chopped green onions, white & green parts
  • 1 teaspoon wasabi paste (or wasabi powder mixed with a little water)
• For the Tuna Marinade:
  • 2 tablespoons teriyaki sauce
  • 1 tablespoon soy sauce
  • 1 tablespoon unseasoned rice vinegar
  • 1 teaspoon grated ginger
• For the Tuna:
  • 32 ounces tuna steaks
  • Oil (for grilling)
  • Salt
  • Pepper

Equipment Needed

• Small bowl
• Grill
• Whisk
• Refrigerator
• Cutting board
• Knife

Instructions

1. Prepare the Wasabi-Green Onion Mayo: In a small bowl, whisk together the mayonnaise, sour cream, chopped green onions, and wasabi paste. Cover the bowl and refrigerate to allow the flavors to meld. This is best done at least an hour before serving, but even a few minutes helps.

2. Create the Tuna Marinade: In a separate bowl, whisk together the teriyaki sauce, soy sauce, unseasoned rice vinegar, and grated ginger. This marinade will impart a savory and slightly sweet flavor to the tuna.

3. Marinate the Tuna: Place the tuna steaks in a shallow dish or resealable bag. Pour the marinade over the tuna, ensuring that each steak is thoroughly coated. Refrigerate for several hours. The longer the tuna marinates, the more flavorful it will become, but don’t marinate for more than 8 hours or the texture of the tuna might be affected.

4. Prepare the Grill: Remove the marinated tuna steaks from the refrigerator about 30 minutes before grilling to allow them to come closer to room temperature. This will help them cook more evenly. Preheat your grill to high heat. Ensure the grill grates are clean and lightly brush them with oil to prevent the tuna from sticking.

5. Sear the Tuna: Lightly brush the tuna steaks with oil and season them with salt and pepper. Place the tuna steaks on the hot grill. Sear for 2 minutes on each side on high heat. This will create a beautiful crust while keeping the inside rare.

6. Adjust Heat and Grill to Desired Doneness: After searing on high heat, lower the grill temperature to medium. Continue grilling the tuna steaks to your desired doneness. For a rare center, grill for another 1-2 minutes per side. For a medium-rare center, grill for 2-3 minutes per side. Be careful not to overcook the tuna, as it can become dry and tough. The internal temperature should reach around 125°F (52°C) for rare and 135°F (57°C) for medium-rare.

7. Serve: Remove the seared tuna steaks from the grill and let them rest for a few minutes before serving. This allows the juices to redistribute, resulting in a more tender and flavorful steak. Serve immediately with the chilled wasabi-green onion mayo.

Expert Tips & Tricks

• Don’t Overcrowd the Grill: If you’re grilling a large quantity of tuna, avoid overcrowding the grill. This will lower the temperature and prevent the tuna from searing properly. Grill in batches if necessary.
• Use High-Quality Tuna: The quality of the tuna is crucial for this dish. Look for sushi-grade tuna steaks that are firm and have a vibrant color. Avoid tuna that looks dull or has a fishy odor.
• Wasabi Paste Variation: If you prefer a milder wasabi flavor, start with a smaller amount of wasabi paste and add more to taste.
• Ginger Infusion: For an even more intense ginger flavor, add a small knob of grated ginger directly to the wasabi mayo.

Serving & Storage Suggestions

Serve the seared tuna steak immediately, ideally with a side of steamed rice, a fresh salad, or grilled asparagus. The vibrant wasabi-green onion mayo adds a creamy, spicy kick that complements the rich tuna.

Leftover seared tuna can be stored in an airtight container in the refrigerator for up to 2 days. While it’s best served fresh, you can enjoy it cold in a salad or sandwich. Reheating seared tuna is not recommended, as it can easily become overcooked and dry. It is not recommended to store the prepared wasabi-green onion mayo at room temperature for more than 2 hours.

Nutritional Information

Nutrient	Amount per Serving	% Daily Value
Calories	424.8 kcal	N/A
Calories from Fat	170 g	40%
Total Fat	18.9 g	29%
Saturated Fat	5.2 g	26%
Cholesterol	97.5 mg	32%
Sodium	801.3 mg	33%
Total Carbohydrate	6.1 g	2%
Dietary Fiber	0.2 g	0%
Sugars	2.9 g	N/A
Protein	54.4 g	108%

Variations & Substitutions

• Spicy Mayo: For a spicier version, add a dash of sriracha or chili garlic sauce to the wasabi mayo.
• Citrus Marinade: Substitute the teriyaki sauce with a mixture of orange juice, lime juice, and a touch of honey for a citrusy twist.
• Sesame Crusted Tuna: Before searing, coat the tuna steaks with sesame seeds for added texture and flavor.
• Dairy-Free Option: Replace the sour cream in the wasabi mayo with vegan mayonnaise or cashew cream.
• Herby Mayo: Incorporate finely chopped cilantro, parsley, or chives to the wasabi mayo for a more herbaceous flavor profile.

FAQs (Frequently Asked Questions)

Q: Can I use frozen tuna steaks for this recipe?
A: Yes, you can use frozen tuna steaks, but make sure they are completely thawed before marinating. Pat them dry with paper towels before marinating to remove excess moisture.

Q: How do I know when the tuna is cooked to the right doneness?
A: The best way is to use a meat thermometer. For rare, aim for an internal temperature of 125°F (52°C), and for medium-rare, 135°F (57°C). The tuna should still be slightly translucent in the center.

Q: Can I make the wasabi mayo ahead of time?
A: Absolutely! In fact, it’s recommended. Making the wasabi mayo at least an hour in advance allows the flavors to meld together beautifully.

Q: What if I don’t have a grill?
A: No problem! You can sear the tuna steaks in a hot skillet on the stovetop. Use a heavy-bottomed skillet, like cast iron, for best results.

Q: Is there a substitute for rice vinegar?
A: If you don’t have rice vinegar, you can use white wine vinegar or apple cider vinegar as a substitute, but use slightly less as they have a stronger flavor.

Final Thoughts

This Seared Tuna Steak with Wasabi-Green Onion Mayo is a dish that truly exemplifies the art of simple elegance. The vibrant flavors and textures, from the rich tuna to the piquant sauce, create a culinary experience that’s both satisfying and memorable. Don’t be intimidated by the word “searing”; with a little practice, you’ll master the technique and impress your friends and family. So, gather your ingredients, fire up the grill (or skillet!), and embark on this flavor-filled adventure. And please, let me know what you think! I always love hearing how others have made this recipe their own, perhaps with a unique side dish or a personalized twist on the marinade. Happy cooking!