Directions

1. Step 1 Boil the potato for 15 mins until soft. Meanwhile, place 25g of the butter and all of the cream in a heavy-based pan and bring to the boil. Slice the spring onions, separating the green and white parts, then add the white slices to the boiling liquid and cook for 1-2 mins to soften. Pass the cooked potato through a ricer or sieve to a really fine mash, then add to the pan and mix everything together. Set aside to cool.
2. Step 2 Add the crabmeat and sliced green bits of spring onion to the potato mixture and stir together. Melt the remaining butter. Unwrap the filo pastry and cover with a clean, damp tea towel to prevent it drying out. Brush melted butter over one sheet, place another on top and brush again with butter. Then add a final sheet of filo.
3. Step 3 Cut the filo sheets lengthways into 3 long strips. Then cut each strip in half across the middle. Place a teaspoon of the crab onto the bottom right-hand corner of each filo strip. Fold the filo over to make a triangle, then fold again, rolling up the strip. When the mixture is enclosed and you have a neat triangle shape, place on a baking sheet and brush with more butter. Can be made ahead up to this point and frozen for up to 1 month.
4. Step 4 Heat oven to 200C/fan 180C/gas 6. Cook the rolls for 15-20 mins until golden and crisp. To serve, pile the parcels up on a plate or bowl, then scatter over with extra sliced spring onion, if you like.