Blackened Tuna with Spicy Cajun Mustard Sauce

Savor the bold flavors of our Blackened Tuna Bites with Cajun Mustard—a delicious, protein-packed dish that’s as nutritious as it is flavorful. Perfect for a health-conscious meal that doesn’t compromise on taste!

Image source: AI-generated

Serves: 4
Prep Time: 10 mins | Cook Time: 10 mins

Ingredients

For the Tuna:

  • 2 lbs fresh tuna steaks, cut into 2-inch cubes
  • 3-4 tbsp redfish blackening seasoning (or Cajun seasoning)
  • ¼ cup olive oil

For the Cajun Mustard Sauce:

  • ½ cup sour cream
  • ½ cup mayonnaise
  • 1½ tbsp spicy brown mustard
  • Juice of 1 lemon
  • 2 tbsp prepared horseradish (adjust to taste)
  • ¼ tsp paprika

Directions

1. Make the Cajun Mustard Sauce
  1. Whisk all sauce ingredients in a small saucepan.
  2. Simmer over medium heat for 3-4 minutes, stirring until smooth. Remove from heat.
2. Sear the Tuna
  1. Coat tuna cubes heavily with blackening seasoning.
  2. Heat olive oil in a cast-iron skillet until almost smoking.
  3. Sear tuna 2-3 minutes per side (7-10 mins total) until crusty outside but pink inside.
3. Serve Immediately
  • Drizzle with warm Cajun mustard sauce or serve on the side.
Pro Tips:
  • Don’t Overcook: Tuna is best medium-rare (internal temp: 125°F).
  • Substitutions: Use jumbo shrimp or salmon instead of tuna.
  • Spice Control: Reduce horseradish for milder sauce.

Perfect with: Crispy roasted potatoes or a cool cucumber salad.

“The bold spices and creamy mustard sauce make this dish unforgettable!” 🔥🐟

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