Remove the pastry from the fridge. Preheat the oven to 220℃ (200℃ fan)/425°F/gas mark 7. Line a baking sheet with baking parchment or a reusable liner.
Place 100g (3½oz) drained and rinsed beans into bowl. Add 50g (2oz) caramelised onion chutney, 50g (2oz) chestnuts and 25g (1oz) cranberries and 50g (2oz) cream cheese and mix to combine . Add 1 clove of crushed garlic. Season with celery salt and a twist of pepper. Add feta cheese and stir to combine.
Unroll the pastry and give iti a light roll with a rolling pin to make it 3 – 4mm (⅛in) thick. Trim the edges of the pastry to neaten if necessary. Cut the pastry into 4 oblongs measuring about 12cm x 18cm. (5x7in).
Spoon a quarter of the filling down the centre of the oblong pastry. Make diagonal cuts down one side of the pastry edges with a sharp knife so that it butts up to the filling. Repeat on the other side so that you have an⅛ equal number of cuts on each side.
Brush beaten egg over the pastry around the filling, then working from alternate sides fold the pastry flaps over the filling all the way down the pastry so that the pastry flaps are inter-linked and resembling a plait. Seal the top and bottom ends.
Transfer to a baking sheet and brush the surface of the plait with beaten egg. Repeat with the remaining pastry and filling.
Bake in the centre of the oven for about 25 minutes until golden brown and the underside of the plait is cooked through. Enjoy. Either serve immediately or transfer to a cooling tray and serve cold as part of a buffet, or re-warm to enjoy later.