Brown Sauce for Fish

Ingredients

• 2 tbsp onion
• 2 tbsp carrot
• 2 tbsp lean raw ham
• 12 peppercorns
• 2 cloves
• 1 sprig marjoram
• 2 tbsp butter
• 2.5 tbsp flour
• 1 cup brown stock
• 1.25 cup white wine
• 0.5 tbsp parsley

Method

Dice the onion, carrot, and ham into 5mm pieces — this size matters because it accelerates the browning process and ensures even flavour distribution without the vegetables breaking down into sludge. Melt the butter in a heavy-bottomed pan over medium heat, then add the aromatics along with the peppercorns, cloves, and marjoram. Cook for five minutes until the vegetables soften and begin to caramelise at the edges — you're after a golden colour, not pale or ash-grey. The mirepoix base here isn't decoration; it's doing the actual work of building the sauce's backbone through the Maillard reaction.

Once the vegetables have taken on colour, dust in the flour and stir continuously for another two to three minutes. This step sauce-making|thickens the base whilst the residual heat toasts the flour itself — you want a nutty smell and a tawny colour, not a raw-flour smell or a blackened roux. You're making a brown roux, the classical stock-based foundation.

Pour in the brown stock first, whisking steadily to prevent lumps forming where the flour sits undissolved. Once incorporated, add the wine gradually — it will steam and hiss, which is correct. The wine's acidity cuts through the richness of the ham and stock and prevents the sauce from tasting one-dimensional. Bring to a simmer and hold there for ten minutes. The sauce should reduce slightly and coat the back of a spoon.

Pass the entire contents through a fine sieve, pressing the cooked vegetables against the mesh with the back of a ladle to extract their essence. Discard the solids. At this stage the sauce will be murky and grainy from the cooked vegetable fibres; the sieving removes that and leaves you with something glossy and coherent. Return to low heat to keep warm without breaking emulsification.

Pour the sauce around (not over — it muddies the fish's exterior) your cooked fish, then finish with freshly chopped parsley scattered across the surface.