Miso and Clotted Cream Mussels with Spinach and Chilli Oil

An unlikely collision that turns out to be perfect: funky white miso melts into rich Cornish clotted cream to build a broth that tastes at once British and Japanese. The mussels open into it, spinach wilts through, and a final slick of crispy Chiu Chow chilli oil gives the whole bowl its kick. Thirty minutes, one pot, a loaf of bread on the side — adapted from Elly Curshen's clever Waitrose original.

How to cook mussels in broth

The broth is built first, the mussels go in briefly in between, and the cream enriches at the end off the heat. Get that sequence right and everything else follows.

Start with the mussels. Tap any that gape at you against the worktop — if they don't close within a few seconds, they're dead and should go in the bin. Pull the wiry beards away (grip, pull firmly towards the hinge) and give them a final rinse. Don't soak them — that kills them. Work through them while the aromatics soften.

Sweat the aromatics properly. Three minutes of steady medium heat is enough to take the harsh edge off the shallot and garlic without browning them. If your pan is too hot and they start to colour, pull it off the heat for a moment — browned garlic will turn the broth bitter. You want them softened and fragrant, not caramelised.

Bloom the miso in the fat. Stirring the paste into the hot oil for a full minute before adding liquid deepens its savoury edge — same principle as toasting tomato paste. It'll smell shift from sharp to nutty and the miso will darken slightly at the edges.

Boil the bouillon, then add the mussels. The liquid needs to be properly at a rolling boil when the mussels go in so the steam drives up through the shells and opens them quickly and evenly. Clamp the lid on tight and give the pot a shake halfway through — the mussels at the bottom open first, and shaking redistributes them so everything cooks in the same window. Three to four minutes is usually plenty; lift the lid at three and check. If most have opened, they're done. Push to five if you must, but mussels turn rubbery fast, so err early rather than late.

Wilt the spinach in the broth. Two minutes under the lid takes it from raw pile to silky, mineral-green ribbons. It also thickens the broth slightly as it releases its water. Don't rush it or stir it in — let the steam do the work.

Cream goes in off the heat. Clotted cream is around 55% fat and will split if you boil it hard. Kill the heat, stir it through, cover again for a minute and let the residual warmth melt it into the broth. The sauce should look glossy and faintly ivory, not greasy or broken.

Discard any mussels that didn't open. A sealed mussel after cooking was likely dead before it went in — not worth the risk.

Taste before you season. Mussels release a lot of their own brine, and miso is salt-heavy. By the time the cream goes in, the broth is almost always balanced. Reach for pepper before salt.

Bonus points

• Make your own crispy chilli oil: Heat 150ml neutral oil with 2 sliced shallots, 4 smashed garlic cloves, a bay leaf and a star anise over low heat for 20 minutes until the aromatics are deep gold. Strain over 3 tablespoons Korean gochugaru, 1 teaspoon Sichuan peppercorns and 1 teaspoon salt in a heatproof bowl. Stir in 1 tablespoon crispy fried shallots. Keeps for a month, and transforms anything it touches.
• Upgrade the miso: Swap half the white miso for red miso for more depth and a darker broth, or use saikyo miso if you want it gentler and sweeter.
• Toast a brown butter crumb: Melt 40g butter until it foams and smells nutty, then toss with 60g panko and a pinch of salt in the hot pan until golden. Scatter over each bowl — the crunch against soft mussels and silky broth is the point.
• Add a splash of sake: A 50ml splash of sake or dry white wine between the miso and the bouillon step adds a touch of acidity that lifts the cream. Let it bubble down for a minute before the water goes in.
• Swap the spinach for wild garlic leaves in spring, or shredded young kale (massaged first) in winter. Wild garlic adds a fresh allium punch that suits the miso beautifully.

Serving

This is unapologetically a bowl dish. Use wide, shallow bowls so everyone gets broth, mussels and spinach in the same spoon, and warm them first — cold bowls kill the cream. Put a communal bowl in the middle of the table for empty shells and stack proper napkins under the cutlery; this is messy eating, and should be.

Bread is non-negotiable — a warm baguette or torn sourdough, for mopping. If you want something more substantial alongside, a pile of skinny fries with aioli turns this into a proper moules-frites with attitude.

For wine, go with something bright and mineral: a Picpoul de Pinet, a young Muscadet sur lie, or a dry Riesling if you want a little lift against the chilli oil. A chilled fino sherry also works beautifully — its salinity mirrors the mussel liquor. Skip anything oaked; the cream in the broth is richness enough.