Add all the sauce ingredients to a blender or jug and blend together until smooth, with little texture. Set aside.
For the fish
Cook your fish of choice by shallow frying in a pan until just cooked through. Spread out a couple of spoonfuls of sauce on a plate and then top with a fish fillet. Garnish with salt & pepper and a light sprinkling of fresh herbs and a wedge of lemon if you like.
Notes
Serving & Storage Suggestions
Fridge: Store romesco sauce in the fridge, well-covered or in an airtight container, for up to a week. For optimal flavour, let it sit at room temperature for about 30 minutes before serving.
Freezer: Romesco sauce freezes well. Allow it to defrost naturally, as microwaving can significantly impact its taste.
Serving Suggestions: This sauce pairs beautifully with fish—barramundi (skin off) is a favorite for its flaky, meaty texture. It also shines with hake, sea bass (with crispy skin), fresh cod, rehydrated salt cod, shrimp, lobster, or grilled squid. Beyond seafood, romesco complements chicken, pork, duck, and a variety of vegetables like asparagus, baby potatoes, artichokes, and more.
Tapas Ideas: Romesco makes an excellent topping for small bites. Try a dollop on a slice of potato tortilla or a skewer of Pinchos Morunos (grilled chicken). The possibilities are truly endless!