Sea Trout Baked with Thyme and Rarebit Mussels

Sea Trout Baked with Thyme and Rarebit Mussels
Fishboxer Sophie from Fishbox HQ

'I love Sea Trout, so this simple recipe really brings out the natural flavours of the fish. The mussels are great with chunks of lightly toasted fresh bread!'


Rarebit Mussels


1 tbsp butter

1 heaped spoon of flour

1 tsp mustard

Bottle of beer (I used a 300ml Scottish IPA)

½ tsp cayenne pepper

½ cup mature cheddar, grated

1 egg yolk

4 hunks of bread


Side of trout or salmon

1 spoon oil (I used rapeseed)

2 lemons, sliced into rounds

Handful of thyme

Salt and pepper

Tin foil



Rarebit Mussels

1. Scrub and remove the beards from the mussels, rinsing under cold water. You can discard any mussels that don’t close when tapped.

2. Pop the mussels in a saucepan and add a glug of beer. Cover with a lid and cook until the shells open (around 4-5 minutes).

3. Meanwhile, melt the butter in a small saucepan and whisk in the flour.

4. Keep the saucepan on a low heat and whisk in the remaining beer slowly, followed by the mustard, cayenne pepper and grated cheese. Stir until smooth and then quickly whisk in the egg yolk.

5. Arrange the mussels on a large plate or shallow bowl. Pour over the sauce (try to get as much as possible inside the shells!) and serve with lightly toasted bread.


Sea Trout Baked With Thyme

1. Preheat oven to 170 degrees. Cover a large roasting tray with tin foil (shiny side facing up) and place the side of fish on top, skin down.

2. Season the fish with salt and a little pepper and add the oil. Lay the lemon rounds along the centre of the fish and sprinkle on more pepper. Place springs of thyme to the sides.

3. Lift up the tin foil and wrap around the fish to create a parcel. Don’t wrap it too tightly, leaving a gap of air above the fish. This ensures the steam can still circulate above the fish in the parcel.

4. Cook for about 30 minutes. Serve with herby new potatoes, balsamic roasted tomatoes and grilled asparagus.