Oven-Roasted Barramundi with Lemon Myrtle and Garlic Butter

By AislePrompt Editorial · Published 2026-05-10 · Updated 2026-05-10

How this recipe was made — this recipe was drafted by AislePrompt's AI-assisted pipeline from technique templates and USDA-sourced nutrition data, and published by AislePrompt Editorial — see how AislePrompt recipes are developed and reviewed.

A delicate Australian barramundi fillet roasted to flaky perfection with native lemon myrtle and a rich garlic butter sauce. This Australian-inspired seafood recipe, ready in about 25 minutes, pairs barramundi fillets, unsalted butter, garlic cloves 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: 15 min Serves 4 Australian cuisine 320 cal/serving

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Ingredients

4 fillets (6 oz each) barramundi fillets
4 tbsp unsalted butter
4, minced garlic cloves
2 tbsp, finely chopped fresh lemon myrtle leaves
2 tbsp lemon juice
1 tbsp olive oil
1 tsp salt
1/2 tsp black pepper
2 tbsp chopped (for garnish) fresh parsley

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Instructions

Step 1: Preheat oven to 400°F (200°C). Pat dry 4 barramundi fillets and place them skin-side down on a lightly oiled baking dish using 1 tbsp olive oil.
Step 2: In a small saucepan over medium heat, melt 4 tbsp unsalted butter. Add 4 minced garlic cloves and 2 tbsp finely chopped fresh lemon myrtle leaves, cooking for 2 minutes until fragrant but not browned.
Step 3: Remove the butter from heat and stir in 2 tbsp lemon juice, 1 tsp salt, and 1/2 tsp black pepper.
Step 4: Pour the garlic lemon myrtle butter evenly over the barramundi fillets.
Step 5: Roast in the preheated oven for 12-15 minutes until the fish flakes easily with a fork and is opaque throughout.
Step 6: Garnish with 2 tbsp chopped fresh parsley before serving with steamed green vegetables or a fresh salad.