For the pâté, blitz the trout, soft cheese, capers and mustard in a food processor, then season with salt, pepper and the lemon juice. Will keep covered in the fridge for up to two days. For the prawns, mix the soured cream, mayo, red onion, dill, lemon juice and hot sauce in a bowl, then toss in the prawns to coat. Will keep covered in the fridge for a day.

Spoon the pâté into a small bowl and the prawns into another. Place these on a large platter with the gravadlax, smoked salmon, whole prawns, crackers, bread, blinis, lemon wedges and caperberries. Sprinkle over dill fronds, then serve.