Perfectly seared tuna steaks with a vibrant avocado salsa that's fresh, flavorful, and naturally keto-friendly, ready in under 20 minutes.

Recipe Details
Units:
Prep: 15 Cook: 6
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
  1. Remove 600g sushi-grade tuna steaks from refrigerator 20 minutes before cooking to bring to room temperature.

  2. 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.

  3. 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.

  4. 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.

  5. Heat 3 tbsp extra virgin olive oil in a large skillet over high heat until smoking. Carefully add tuna steaks.

  6. Sear for 1-2 minutes per side for rare, or 2-3 minutes per side for medium-rare. The center should remain pink.

  7. Remove tuna from heat and let rest for 2 minutes.

  8. Slice tuna steaks against the grain into 1cm thick slices.

  9. 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.