July 17, 2026 · 10 min

Pan-Seared Barramundi with Lemon Basil Butter and Green Beans Amandine

Dinner10 min2150 cal / serving

This pan-seared barramundi recipe is a celebration of spring flavors. The fish is seasoned simply, then cooked until the skin is crispy and the flesh is flaky. A quick lemon basil butter sauce adds a burst of brightness, while the sides-creamy mashed potatoes and crunchy green beans amandine-round out the meal perfectly.

Barramundi is a sustainable, mild white fish that cooks quickly, making it ideal for weeknight dinners. The green beans are roasted with garlic and topped with toasted almonds for a delightful crunch and the mashed potatoes are enriched with sour cream for extra creaminess. A final squeeze of fresh lemon juice ties everything together.

Recipe details

Dinner10 min2150 cal / serving2 servings

Nutrition per serving

Calories2150 kcalProtein11.5 gFat199.7 gCarbs80.9 gSugar22.9 gFiber5.5 gSodium1759 mg

Dietary labels

Gluten-free: yesLactose-free: noDairy-free: no

Allergen check

Gluten / wheat: not detectedMilk / dairy: containsEgg: not detectedFish: containsShellfish: not detectedPeanut: not detectedTree nuts: containsSoy: not detectedSesame: not detectedMustard: not detectedCelery: not detectedSulphites: not detectedLupin: not detectedMolluscs: not detected

Values are calculated per serving from ingredient amounts and the ingredient nutrition reference per 100g. Allergen and diet labels use available ingredient metadata and name matching; always check product labels for strict diets or allergies. Some ingredient amounts or nutrition values were incomplete, so this is marked as a partial estimate.

Ingredients

Sour Cream3 tablespoon Sour CreamView ingredient guide
Potatoes12 ounce PotatoesView ingredient guide
Green Beans8 ounce Green BeansView ingredient guide
Lemon0.25 unit LemonView ingredient guide
Garlic1 clove GarlicView ingredient guide
Barramundi10 ounce BarramundiView ingredient guide
Sliced Almonds0.5 ounce Sliced AlmondsView ingredient guide
Basil Paste1 ounce Basil PasteView ingredient guide
Saltteaspoon (tsp) SaltView ingredient guide
Cooking Oil3 teaspoon (tsp) Cooking OilView ingredient guide
Butter2 tablespoon (tbsp) ButterView ingredient guide
Black Pepperteaspoon (tsp) Black PepperView ingredient guide

Instructions

  1. Adjust rack to top position and preheat oven to 425°F. Wash and dry produce. Dice potatoes into ½-inch pieces. Place in a medium pot with enough salted water to cover by 2 inches. Bring to a boil and cook until tender, 10-15 minutes. Reserve 1 cup potato cooking liquid, then drain and return potatoes to pot. Cover to keep warm (you’ll finish the potatoes in Step 5).
  2. While potatoes cook, trim green beans if necessary. Peel and mince or grate garlic. Quarter lemon.
  3. Toss green beans on a baking sheet with a drizzle of oil, half the garlic, salt and pepper. Roast on top rack for 10 minutes. Once green beans have roasted 10 minutes, remove sheet from oven. Carefully sprinkle almonds over green beans. Return to top rack and roast until green beans are tender and almonds are browned and fragrant, 2-5 minutes more.
  4. While green beans roast, pat barramundi dry with paper towels. Season all over with salt and pepper. Heat a large drizzle of oil in a large, preferably nonstick, pan over medium-high heat. Add barramundi, skin sides down and cook until skin is crispy, 4-5 minutes. Flip and cook until barramundi is opaque and cooked through, 2-3 minutes more. Turn off heat; transfer to a plate. Wipe out pan and let cool 2 minutes.
  5. To pot with potatoes, add sour cream and mash until smooth and creamy, adding splashes of reserved potato cooking liquid as needed. Taste and season with salt and pepper if desired.
  6. Melt 2 tablespoons butter in pan used for barramundi over medium-low heat. Add basil paste, remaining garlic and juice from one lemon wedge. Cook, whisking constantly, until fully incorporated and warmed through, 1-2 minutes.
  7. Divide mashed potatoes, barramundi and green beans amandine between plates. Drizzle basil sauce over barramundi and serve with any remaining lemon wedges on the side.

Recipe Tips

For extra crispy skin, make sure the barramundi is patted very dry before seasoning.

If you don’t have basil paste, you can substitute 2 tablespoons of finely chopped fresh basil mixed with 1 teaspoon of olive oil.

To save time, you can boil the potatoes while the green beans roast.

FAQ

Can I use a different fish instead of barramundi?

Yes, you can substitute any firm white fish such as cod, halibut or sea bass. Adjust cooking time based on thickness.

What can I use instead of sour cream in the mashed potatoes?

You can substitute Greek yogurt or cream cheese for a similar creamy texture. For a dairy-free option, use unsweetened plant-based yogurt or extra butter and milk.

Can I make this recipe ahead of time?

The mashed potatoes and green beans can be prepared in advance and reheated. The fish is best cooked fresh, but you can cook it up to an hour ahead and reheat gently in a low oven.

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