Avocado-Crusted Tuna Steak
A seared tuna steak coated in creamy avocado, served with a light citrus-herb drizzle. This seafood-inspired seafood (keto, high-protein) ready in about 14 minutes pairs tuna steaks, medium, mashed avocado, olive oil for a weeknight-friendly dinner that comes together with one pan and minimal cleanup. Each serving lands at about 310 calories and feeds 1, so it slots cleanly into a weekly meal plan and pairs well with a quick salad or grain on the side. Tap "Plan a meal with the AI" below to drop this recipe into your week and send the ingredients straight to Instacart. Nutrition values are approximate, calculated from USDA FoodData Central (fdc.nal.usda.gov) — verify against ingredient labels for any health-driven dietary plan.
Ingredients
- 6 oz tuna steaks
- 1/4 medium, mashed avocado
- 1 tsp olive oil
- 1/2 tsp lime juice
- 1 tsp, chopped fresh cilantro
- 1/4 tsp sesame seeds
- 1/4 tsp sea salt
- 1/8 tsp black pepper
Instructions
- Step 1: Pat tuna steaks dry with paper towels. Mix mashed avocado, 1/2 tsp lime juice, 1 tsp chopped cilantro, 1/4 tsp sesame seeds, 1/4 tsp sea salt, and 1/8 tsp black pepper in a small bowl to form a paste.
- Step 2: Coat both sides of tuna steaks evenly with the avocado mixture, pressing gently to adhere.
- Step 3: Heat 1 tsp olive oil in a cast-iron skillet over medium-high heat until smoking. Sear tuna for 1 minute per side for rare doneness, or 2 minutes per side for medium.
- Step 4: Transfer tuna to a plate and let rest for 2 minutes. Drizzle with remaining 1/2 tsp lime juice and garnish with extra cilantro before serving.
Equipment for this recipe
Top-rated tools to make this recipe successfully.
Frequently asked questions
How long does Avocado-Crusted Tuna Steak take to make?
Total time is about 14 minutes (12 min prep + 2 min cook). Most home cooks find this fits comfortably into a weeknight; double the batch on Sunday for two dinners.
How do I store leftover Avocado-Crusted Tuna Steak?
Cool to room temperature within 2 hours, then store in an airtight container in the fridge for up to 4 days. Reheat covered in a 350°F oven for 10-12 minutes, or microwave at 70% power in 60-second bursts to keep tuna steaks from drying out.
Can I substitute ingredients in Avocado-Crusted Tuna Steak?
Yes — most ingredients in this recipe have flexible swaps. For oil, use any neutral high-smoke-point oil (avocado, grapeseed, refined coconut). For aromatics, dried herbs at ⅓ the volume of fresh work in a pinch. The full ingredient list is shoppable on Instacart so you can see substitutes in real time.
How do I scale Avocado-Crusted Tuna Steak for a different number of people?
The recipe is written for 1 servings. Multiply each ingredient by (your serving target / 1). Cook time stays roughly the same up to 2x; for 3-4x batches, switch from a skillet to a sheet pan or stockpot so the food isn't crowded — overcrowding steams instead of browns.
Is Avocado-Crusted Tuna Steak keto?
Yes — this recipe is tagged keto, high-protein based on its ingredient list. Always cross-check labels for packaged ingredients (sauces, broths, condiments) since formulations vary by brand.
What others are saying
- ★★★★★
My partner, who's usually picky, absolutely loved this.
- ★★★★☆
Good flavors but the sauce was a bit thin. I'd reduce it longer.
- ★★★★☆
Good flavors but the sauce was a bit thin. I'd reduce it longer.
