Instructions: Brush tuna steaks on both sides with the oil and season with salt and pepper.

Combine the butter, onion, lime juice, soy sauce and wasabi in a small pan.

Heat a heavy, nonstick frying pan over high heat. Place the tuna in the pan and sear until crispy and brown. Turn over and sear the other side. Be careful not to overcook the tuna. Its best rare to medium-rare.

While the tuna is cooking, heat the butter mixture over low heat, stirring constantly until smooth and emulsified.

Serve the tuna immediately, drenched with the sauce.

This recipe yields 4 servings.

Description: "The sauce is extremely good with other fish such as salmon and halibut. For vegetables, spinach, asparagus and snowpeas are a good match with the sauce and tuna."

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