Chilli and Lemongrass Sea Bass

This Chilli and Lemongrass Sea Bass is a dish I come back to again and again. The fish itself is quick and simple, but the sauce is the part I can’t get enough of. Inspired by Vietnamese sate, it layers heat, fragrance, and sweetness in a way that feels complete with every bite. The process is all about patience: letting the aromatics soften and caramelise slowly in oil until their raw edges fade and the flavour deepens. It’s a small step that makes all the difference, turning a handful of ingredients into something you’ll want to spoon over everything. 

Ingredient Breakdown

• Lemongrass – sharp citrus fragrance that cuts through the richness
• Vegetable oil – neutral base that carries the flavours
• Red chillies – fresh heat, adjustable depending on your preference
• Banana shallot – gentle sweetness to balance the spice
• Garlic cloves – earthy depth to round out the sauce
• Chilli flakes – warming background heat that lingers
• Sugar – a touch to balance savoury and spicy notes
• Salt or fish sauce – either clean salinity or fermented depth
• Sea bass fillets – crisp skin, tender flesh, perfect with bold sauces

Building the Chilli and Lemongrass Sauce

This sauce looks straightforward, but the detail is in how you cook it. The lemongrass must be blitzed fine so it softens properly. If it’s left too coarse, it stays tough and fibrous. Once it hits the oil, give it time. Those first minutes are about coaxing out fragrance and allowing it to turn just golden. That’s when the sharp rawness mellows into something citrusy and rounded.

Only then do the shallots, garlic, and chillies go in. Adding them later stops anything from burning before it’s ready. The key is gentle cooking: enough heat to draw out sweetness, never so much that it tips into bitterness. When you stir in chilli flakes, sugar, and salt (or fish sauce), the whole mixture deepens into something greater than the sum of its parts.

I always make more than I need for this dish. The leftovers are gold. Stir a spoonful through hot rice with a splash of soy and you’ve got a side that tastes like a meal. Brush it over grilled aubergine or toss it through noodles and it transforms instantly. It’s worth having a jar in the fridge for those moments when dinner needs a lift.

Cooking the Fish for Chilli and Lemongrass Sea Bass

Sea bass is a joy to cook when you get the skin right. The trick is dryness and heat. Start by patting the fillets with kitchen paper until they’re completely dry. That way, the skin doesn’t steam and turn limp. Heat the pan until it’s hot, then add a thin layer of oil.

As soon as the fish goes in, press it gently with a spatula. This keeps it flat so the whole skin crisps evenly. I start at medium-high heat to get colour, then lower it to medium so the flesh cooks gently underneath. After three or four minutes, the skin should release cleanly from the pan. Flip it briefly, just long enough for the flesh to turn opaque.

Serve the fish skin-side up, because that’s the part you want to keep crisp. A spoonful of the sauce on the side is enough — you don’t need to drown it. Each bite should pick up crunch from the skin and heat from the sauce, a balance that never gets old.

Vietnamese Flavours Behind the Dish

The idea for this sauce comes straight from Vietnamese sate, though I’ve pared it back to its essentials. What I love about Vietnamese cooking is how much it can do with so little. Rather than relying on heavy spices, it builds intensity from aromatics like garlic, chilli, and lemongrass, cooked in a way that draws out every bit of flavour.

Fish sauce, if you use it instead of salt, adds another layer. It has that fermented savouriness that defines much of Southeast Asian cooking. On its own it can feel intense, but blended with garlic and chilli, it makes everything taste more complete. Lemongrass cuts through the richness, leaving the sauce bright instead of heavy.

Keeping the sea bass simple is deliberate. The crisp skin and delicate flesh don’t need anything more complicated. They provide the clean canvas the sauce deserves. That balance — simple fish, bold condiment — feels very Vietnamese in spirit.

What to Serve with Chilli and Lemongrass Sea Bass

I like to keep the sides simple and let the sauce do the work. Plain steamed rice is the obvious partner, but it becomes something else once you stir through a spoonful of sauce and a dash of soy. It’s the easiest way to make the meal feel complete.

Vegetables should stay light and fresh. Steamed greens like pak choi or tenderstem broccoli soak up the sauce beautifully. A crisp cucumber salad with a sharp dressing also works well, like my Spicy Smacked Cucumber Salad, cutting through the heat and oil.

Herbs are a great way to finish the dish. Coriander or Thai basil add brightness, while mint gives a cooling lift against the chilli. Scatter them at the table rather than mixing them in so people can help themselves.

Because the sauce keeps so well, you can plan for leftovers. The next day, toss it through rice noodles with prawns, or whisk it into a dressing for a slaw. It’s the kind of thing that makes you glad you made extra.

Final Thoughts on Chilli and Lemongrass Sea Bass

Chilli and Lemongrass Sea Bass is a perfect example of how a few well-treated ingredients can deliver far more than you expect. The fish itself is simple, but the sauce takes it into another league. Crisp skin, soft flesh, and a spoonful of heat and fragrance on the side — it’s the kind of combination that feels both comforting and exciting.

For me, this recipe is about more than just a single dish. It’s about having a sauce that keeps giving. Once you’ve made it, you’ll find new uses every time you open the fridge. That’s why I return to it so often: it never feels the same twice, but it always delivers.

Love this Chilli and Lemongrass Sea Bass? You’ll Love these other Fish Recipes 

I’ve been sharing lots of delicious fish recipes on my Instagram and TikTok in a series I’ve called Fantastic Fish. If you love this recipe, here are some other delicious fish recipes that you might enjoy.

• Coconut Milk Poached Fish:  Inspired by Southeast Asian flavours, this dish features tender, flaky white fish, gently cooked in a fragrant, aromatic coconut broth. 
• Coconut Miso Fish: Tender cod fillets poached in a creamy, umami-rich coconut miso broth that’s deeply comforting without being heavy. 
• Fish Katsu Curry: Swapping chicken for fish brings a new lightness and crispiness to the dish. It gets an extra layer of depth from caramelised onions – a small detail that makes all the difference.
• Crispy Sea Bass with Spring Onion and Ginger Oil: Despite only using 4 ingredients, this dish is packed with flavour. And as if that weren’t enough, it’s incredibly easy to make and comes together in less than 20 minutes.
• Coconut-Crusted Thai Curry Sea Bass: If you’re a fan of Thai flavours, you’re going to love this one. The fish is marinated in Thai red curry paste, before being encased in a coconut crust and fried to golden perfection.
• Roasted Salmon with Curry Leaf Butter: Roasted salmon, topped with a delicious 3-ingredient curry leaf butter.