Slow-Roasted Argentine Sea Bass with Antarctic Herb Butter
Tender slow-roasted Argentine sea bass topped with a fragrant herb butter inspired by the unique flora surrounding Antarctica. This seafood-inspired seafood ready in about 45 minutes pairs 5 oz each Argentine sea bass fillets, softened Unsalted butter, Fresh dill, chopped for a weeknight-friendly dinner that comes together with one pan and minimal cleanup. Each serving lands at about 350 calories and feeds 4, 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
- 4 pieces, 5 oz each Argentine sea bass fillets
- 6 tbsp, softened Unsalted butter
- 2 tbsp Fresh dill, chopped
- 1 tbsp Fresh chives, chopped
- 1 tsp Fresh lemon zest
- 1 tsp Salt
- 1/2 tsp Black pepper
- 2 tbsp Olive oil
Instructions
- Step 1: Preheat your oven to 275°F. In a bowl, mix 6 tbsp softened unsalted butter with 2 tbsp chopped fresh dill, 1 tbsp chopped fresh chives, 1 tsp lemon zest, 1 tsp salt, and 1/2 tsp black pepper until fully combined and aromatic.
- Step 2: Pat dry 4 Argentine sea bass fillets (5 oz each) and drizzle 2 tbsp olive oil over them, rubbing to coat evenly.
- Step 3: Place the fillets on a baking tray lined with parchment paper, then spread an even layer of the herb butter mixture over the top of each fillet.
- Step 4: Roast in the oven for 25-30 minutes or until the fish flakes easily with a fork and the butter has melted into a glossy topping.
- Step 5: Remove from the oven and let rest for 3 minutes before serving to enhance the buttery herb flavor.
Equipment for this recipe
Top-rated tools to make this recipe successfully.
Frequently asked questions
How long does Slow-Roasted Argentine Sea Bass with Antarctic Herb Butter take to make?
Total time is about 45 minutes (15 min prep + 30 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 Slow-Roasted Argentine Sea Bass with Antarctic Herb Butter?
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 softened unsalted butter from drying out.
Can I substitute ingredients in Slow-Roasted Argentine Sea Bass with Antarctic Herb Butter?
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 Slow-Roasted Argentine Sea Bass with Antarctic Herb Butter for a different number of people?
The recipe is written for 4 servings. Multiply each ingredient by (your serving target / 4). 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 Slow-Roasted Argentine Sea Bass with Antarctic Herb Butter?
Seafood seafood like this pair well with a simple grain (rice, couscous, or crusty bread), a quick salad with acid (lemon vinaigrette, pickled onions), and a pan sauce or yogurt-based dip. Tap "Plan a meal with the AI" to get specific side suggestions.
