Slow-Roasted Barramundi with Finger Lime Beurre Blanc

By AislePrompt Test Kitchen · Reviewed by AislePrompt Editorial · ·

Delicately slow-roasted barramundi fillets served with a citrusy finger lime beurre blanc sauce for a taste of Australia's coastal waters. This australian-inspired seafood ready in about 35 minutes pairs x 6 oz, skin on barramundi fillets, sea salt, white pepper for a weeknight-friendly dinner that comes together with one pan and minimal cleanup. Each serving lands at about 320 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.

Prep: 10 min Cook: 25 min Serves 4 Australian cuisine 320 cal/serving
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Ingredients

Instructions

  1. Step 1: Preheat oven to 275°F (135°C). Pat dry 4 x 6 oz barramundi fillets with skin on, then season both sides with 1 tsp sea salt and 1/2 tsp white pepper.
  2. Step 2: Place the fillets skin-side down on a baking tray lined with parchment paper. Drizzle 1 tbsp olive oil over the fillets and roast gently in the oven for 20-25 minutes until the fish flakes easily but remains moist.
  3. Step 3: While the fish roasts, prepare the beurre blanc sauce. In a small saucepan over medium heat, combine 2 tbsp finely chopped shallots, 1/3 cup dry white wine, and 2 tbsp white wine vinegar. Simmer until reduced to about 2 tbsp liquid, then reduce heat to low.
  4. Step 4: Gradually whisk in 6 tbsp cold cubed unsalted butter a few pieces at a time until the sauce is smooth and slightly thickened, keeping it warm but not boiling.
  5. Step 5: Stir in 2 tbsp finger lime pearls and 1 tbsp lemon juice to the sauce just before serving.
  6. Step 6: Plate the slow-roasted barramundi fillets and spoon the finger lime beurre blanc over the top for a bright, elegant seafood dish.

Equipment for this recipe

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Frequently asked questions

How long does Slow-Roasted Barramundi with Finger Lime Beurre Blanc take to make?

Total time is about 35 minutes (10 min prep + 25 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 Barramundi with Finger Lime Beurre Blanc?

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 sea salt from drying out.

Can I substitute ingredients in Slow-Roasted Barramundi with Finger Lime Beurre Blanc?

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 Barramundi with Finger Lime Beurre Blanc 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 Barramundi with Finger Lime Beurre Blanc?

Australian 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.

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