Perfectly seared tuna steaks with a vibrant avocado salsa that's fresh, flavorful, and naturally keto-friendly, ready in under 20 minutes.
Recipe Details
Ingredients
- 600g sushi-grade tuna steaks, 2.5cm thick
- 2 large ripe avocados, diced
- 1 medium cucumber, seeded and diced
- ¼ small red onion, finely diced
- 150g cherry tomatoes, quartered
- 1 small jalapeño, seeded and minced
- 3 tbsp fresh lime juice
- 3 tbsp extra virgin olive oil
- 1 tbsp sesame oil
- 30g fresh cilantro, chopped
- 2 tbsp sesame seeds
- 2 tbsp soy sauce
- 1 tsp wasabi powder
- 1 tsp sea salt
- ½ tsp freshly ground black pepper
- 1 lime lime wedges for serving
Instructions
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Remove 600g sushi-grade tuna steaks from refrigerator 20 minutes before cooking to bring to room temperature.
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For the avocado salsa, gently combine 2 large ripe avocados, 1 medium cucumber, ¼ small red onion, 150g cherry tomatoes, 1 small jalapeño, 30g fresh cilantro, and 2 tablespoons 3 tbsp fresh lime juice in a bowl. Season with 1 tsp sea salt and set aside.
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In a small bowl, whisk together 2 tbsp soy sauce, 1 tbsp sesame oil, 1 tsp wasabi powder, and remaining lime juice to make a sauce.
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Season tuna steaks with 1 tsp sea salt and ½ tsp freshly ground black pepper. Press 2 tbsp sesame seeds onto both sides of each steak.
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Heat 3 tbsp extra virgin olive oil in a large skillet over high heat until smoking. Carefully add tuna steaks.
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Sear for 1-2 minutes per side for rare, or 2-3 minutes per side for medium-rare. The center should remain pink.
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Remove tuna from heat and let rest for 2 minutes.
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Slice tuna steaks against the grain into 1cm thick slices.
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Serve immediately with avocado salsa on the side, drizzled with the soy-wasabi sauce and 1 lime lime wedges for serving.
Tips
Tuna Quality: Use only sushi-grade tuna from a reputable fishmonger. It should smell fresh and ocean-like, never fishy.
High Heat Searing: The pan should be smoking hot for proper searing. This creates a crust while keeping the center rare.
Doneness: Tuna is best served rare to medium-rare. Overcooking makes it dry and tough.
Avocado Prep: Add lime juice immediately to prevent browning. Choose ripe but firm avocados.
Carb Count: This recipe contains approximately 5g net carbs per serving.
Serving Temperature: Serve immediately while tuna is warm and avocado salsa is fresh and cool.