My Classic Whole Poached Salmon with Cucumber 'Scales'
A whole poached salmon is a true kitchen triumph, perfect for any celebration. My method ensures a beautifully moist and flavourful fish every single time.
There is something truly magnificent about a whole poached salmon, presented cool and gleaming as the centrepiece of a summer lunch or celebratory buffet. For many, the very thought of cooking a whole fish induces a certain amount of panic, but I am here to tell you that it is one of the simplest, and most rewarding, things you can do in the kitchen. The fear is entirely misplaced, I promise you.
The secret lies not in frantic boiling or complicated timings, but in a gentle, quiet method that coaxes the fish to perfection. We will create a fragrant poaching liquid, called a court-bouillon, which infuses the salmon with a subtle, aromatic flavour from the very beginning. Then, we let gentle heat and a long, slow cooling period do all the work.
This is a recipe that teaches a fundamental lesson in cookery: respect for the ingredient. When you have a beautiful, fresh salmon, your job is not to over-complicate it, but to cook it in a way that allows its natural flavour and texture to shine. Follow these steps with me, and you will have a showstopper that will not only delight your guests but give you a wonderful sense of achievement.
Why You'll Love This Recipe
- The court-bouillon, a lightly acidic and aromatic liquid, seasons the fish from the inside out and helps the flesh to remain firm.
- Poaching at a sub-simmer—never boiling—cooks the fish gently and evenly, guaranteeing a moist texture that is impossible to achieve with high heat.
- Cooling the salmon completely in its poaching liquid is the most crucial step. As it cools, the fish reabsorbs some of the liquid, ensuring it is succulent and flavourful, never dry.
Ingredients
- 1 whole salmon, about 2-2.5kg (4½-5½ lb), cleaned and gutted
- For the Court-Bouillon:
- 4 litres (7 pints) water
- 300ml (½ pint) white wine vinegar
- 2 level tablespoons salt
- 1 large onion, peeled and roughly chopped
- 1 large carrot, scrubbed and roughly chopped
- 2 celery sticks, roughly chopped
- 12 black peppercorns
- 2 bay leaves
- A small bunch of parsley stalks
- For Decoration and Serving:
- 1 large cucumber
- A few sprigs of fresh dill
- 2 black olives, for the 'eyes'
- Homemade Mayonnaise, to serve
- New potatoes, to serve
- Watercress, to serve
Equipment Needed
Fish kettle (highly recommended) · Large stockpot (if no fish kettle) · Fine-meshed sieve · Muslin cloth (optional) · Long serving platter · Vegetable peeler · Small sharp knife
Step-by-Step Instructions
- First, make the court-bouillon. If you have a fish kettle, place all the court-bouillon ingredients into it. If not, use your largest stockpot. Bring it to a boil, then reduce the heat, pop a lid on, and let it simmer gently for 20 minutes to allow the flavours to infuse.
- While the liquid simmers, prepare the salmon. Ensure it is well-cleaned. There is no need to scale it, as you will be removing the skin later. Some people like to wrap the fish in muslin to make it easier to lift out, which is a good idea if you are at all nervous.
- After 20 minutes, strain the court-bouillon through a fine sieve into a clean pan (or back into the fish kettle if you used a separate pot). Allow it to cool down to room temperature. This is important; placing the fish into boiling liquid will make it tough.
- Now, gently lower your prepared salmon into the cooled court-bouillon. The liquid should cover the fish completely. Place the fish kettle or pot over a medium heat and watch it very carefully. You want to bring it up to what we call a 'scant simmer' – that is, you will see a faint shimmer on the surface and perhaps one or two bubbles rising. Do not, under any circumstances, allow it to boil.
- As soon as it reaches this point, turn the heat off immediately. Place the lid on tightly and leave the salmon to cook and cool completely in the liquid. This will take at least 4 hours, but you can leave it overnight in a cool place. This is the secret to a perfectly moist poached salmon.
- Once completely cold, very carefully lift the salmon out of the liquid. A fish kettle will have a trivet that makes this simple. Otherwise, you may need two people and a couple of fish slices. Place it on a board.
- To prepare for serving, carefully peel away the top layer of skin, starting from the head and peeling back towards the tail. You may need a small knife to help. Scrape away any dark grey-brown fat underneath to reveal the beautiful pink flesh.
- Now for the decoration. Using a vegetable peeler, peel the cucumber. Then continue to peel long, thin strips of the cucumber flesh. Arrange these strips in an overlapping pattern along the body of the salmon to look like scales. Place the two black olives in the eye sockets and garnish the platter with fresh dill and watercress.
- Transfer the decorated salmon to a long serving platter. Serve chilled with new potatoes tossed in butter and mint, and a bowl of good homemade mayonnaise.
Delia's Notes from the Kitchen
A note on buying your salmon: this is a dish where the quality of the main ingredient is paramount. Do make friends with a good fishmonger. Ask for a beautifully fresh, glistening salmon with bright eyes. It makes all the difference. The 'cucumber scales' are a classic, but don't feel you must do them. A simple scattering of chopped dill or parsley over the pink flesh is just as lovely.
How to Store & Reheat
Poached salmon is best served cold and should not be reheated. Leftovers should be covered tightly with cling film and stored in the fridge for up to 2 days. The leftover fish is wonderful flaked into salads, mixed with mayonnaise for sandwiches, or used to make fishcakes.
Frequently Asked Questions
I don't own a fish kettle. Is there an alternative?
Yes, although a fish kettle makes life much easier. You can hire them from some kitchen shops, but you can also improvise. The best method is to use a large roasting tin straddled across two hob rings. You may need to gently bend the salmon to fit. Alternatively, for a smaller fish, a very large stockpot will do.
How can I be absolutely sure the salmon is cooked through?
The 'turn off and cool' method is incredibly reliable for a fish of this size. The residual heat of the liquid cooks it perfectly. If you are uncertain, you can insert a thin skewer into the thickest part of the fish (near the head); if it goes in easily with no resistance, it is cooked.
Why must I cool the salmon in the liquid? It seems to take so long.
This is the single most important step for a succulent result. As the fish cooks, it expels some of its juices. By allowing it to cool in the seasoned liquid, the flesh relaxes and reabsorbs moisture, making it incredibly moist and flavourful. If you remove it hot, it will be dry.
Can I prepare the entire dish a day ahead?
Absolutely. In fact, it is an ideal dish to make in advance for a party. You can poach and cool the fish the day before. Keep it in its liquid in the fridge overnight. Decorate it just before you are ready to serve to ensure the cucumber is fresh and crisp.
My fishmonger has offered to scale the fish. Should I let them?
It is not necessary as the skin is removed before serving. However, if they do scale it, it does no harm at all. The most important thing is that the fish is properly gutted and cleaned.