Slow-Roasted Barramundi with Lemon Myrtle and Wattleseed Crust

By AislePrompt Test Kitchen · Reviewed by AislePrompt Editorial · ·

Delicate barramundi fillets slow-roasted with a fragrant crust of lemon myrtle and wattleseed for a tender, flavorful seafood dish. This australian-inspired seafood (low carb) ready in about 40 minutes pairs fillets (6 oz each) barramundi fillets, lemon myrtle powder, ground wattleseed for a weeknight-friendly dinner that comes together with one pan and minimal cleanup. Each serving lands at about 260 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.

Prep: 10 min Cook: 30 min Serves 4 Australian cuisine 260 cal/serving
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Ingredients

Instructions

  1. Step 1: Preheat oven to 275°F (135°C). Pat dry 4 barramundi fillets and place on a baking sheet lined with parchment paper.
  2. Step 2: In a small bowl, mix 1 tbsp lemon myrtle powder, 1 tbsp ground wattleseed, 1 tsp sea salt, and 1/2 tsp freshly ground black pepper.
  3. Step 3: Brush each fillet evenly with 3 tbsp olive oil and sprinkle the lemon myrtle and wattleseed mixture over the top, pressing lightly to adhere.
  4. Step 4: Roast the fillets in the oven for 25-30 minutes until the fish is opaque and flakes easily with a fork.
  5. Step 5: Serve immediately with fresh lemon wedges for squeezing over.

Frequently asked questions

How long does Slow-Roasted Barramundi with Lemon Myrtle and Wattleseed Crust take to make?

Total time is about 40 minutes (10 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 Barramundi with Lemon Myrtle and Wattleseed Crust?

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 lemon myrtle powder from drying out.

Can I substitute ingredients in Slow-Roasted Barramundi with Lemon Myrtle and Wattleseed Crust?

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 Lemon Myrtle and Wattleseed Crust 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.

Is Slow-Roasted Barramundi with Lemon Myrtle and Wattleseed Crust low carb?

Yes — this recipe is tagged low carb based on its ingredient list. Always cross-check labels for packaged ingredients (sauces, broths, condiments) since formulations vary by brand.