Pan-Seared Tuna with Avocado and Lime
Perfectly seared tuna steak topped with fresh avocado and zesty lime, paired with steamed green beans. This American-inspired Whole30 recipe, ready in about 16 minutes, pairs tuna steaks, avocado oil, lime for a weeknight-friendly dinner that comes together with one pan and minimal cleanup. Each serving lands at about 300 calories and feeds 2, so it slots cleanly into a Whole30 week and pairs well with roasted sweet potato or a simple olive-oil salad. 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
- 2 (6 oz each) tuna steaks
- 1 tbsp avocado oil
- 1/2, zested and juiced lime
- 1/2, sliced avocado
- 1/4 tsp salt
- 1/4 tsp black pepper
- 1 cup, trimmed green beans
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Equipment for this recipe
Top-rated tools to make this recipe successfully.
Instructions
- Step 1: Pat tuna steaks dry with paper towels. Season both sides with 1/4 tsp salt and 1/4 tsp black pepper. Heat 1 tbsp avocado oil in a skillet over medium-high until shimmering.
- Step 2: Place tuna steaks in the skillet and sear for 2-3 minutes per side, until golden brown on the outside and medium-rare inside.
- Step 3: Transfer to a plate, top with 1/2 tbsp lime juice, 1/2 tsp lime zest, and 1/2 sliced avocado. Serve immediately with 1 cup steamed green beans.
Frequently asked questions
How long does Pan-Seared Tuna with Avocado and Lime take to make?
Total time is about 16 minutes (10 min prep + 6 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 Pan-Seared Tuna with Avocado and Lime?
Refrigerate in a covered airtight container for up to 3–4 days (FDA FoodKeeper guideline for cooked fish). Store any fresh salsa or citrus-based garnish in a separate container — it keeps for up to 2 days. Freeze cooked fish (without fresh garnishes) for up to 3 months; thaw overnight in the fridge and reheat gently at 275°F until just warmed through to preserve texture.
Can I substitute ingredients in Pan-Seared Tuna with Avocado and Lime?
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 Pan-Seared Tuna with Avocado and Lime for a different number of people?
The recipe is written for 2 servings. Multiply each ingredient by (your serving target / 2). 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.
What goes well with Pan-Seared Tuna with Avocado and Lime?
American whole30 like this pair well with a compliant starch (roasted sweet potato, cauliflower rice, or plantains), a crisp salad dressed with olive oil and lemon, and sliced fruit. Skip grains, legumes, dairy and added sugar — none of them are Whole30-compliant. Tap "Plan a meal with the AI" to get specific side suggestions.
What others are saying
- ★★★★★
Whole30-friendly and impressive enough for guests. Searred the tuna to rare perfection with just a sprinkle of salt.
- ★★★★★
This is my go-to dinner for busy weeknights! The avocado and lime elevate the tuna perfectly without overpowering it.
- ★★★★★
The lime in the avocado mash was genius—brightened up the whole dish. Served with roasted sweet potatoes for a complete meal.
