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          6 sticks of young rhubarb 
          175 g/6 oz/1.5 cups plain (all-purpose) flour 
          A pinch of salt 
          75 g/3 oz hard block margarine, diced 
          25 g/1 oz/2 tbsp caster (superfine) sugar 
          1 egg, separated 
          Cold water, to mix 
          Icing (confectioners') sugar, for dusting 
          
          
          Classic Custard Sauce, to serve  | 
        
        
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          Method: 
          
          Trim the rhubarb and cut into 30 cm/12 
          in lengths. Sift the flour and salt into a bowl. Add the margarine and 
          rub in with the fingertips until the mixture resembles fine 
          breadcrumbs. Stir in the sugar. Mix with the egg yolk and enough cold 
          water to form a firm dough. Knead gently on a lightly floured surface. 
          Roll out to a rectangle 46 x 33 cm/18 x 13 in. Cut into six equal 
          strips, 33 cm/13 in long. Place a stick of rhubarb on each strip. 
          Brush the edges of the pastry (paste) with a little egg white and fold 
          over to cover the rhubarb completely, pressing the edges firmly 
          together to seal. Repeat with the remaining rhubarb. Knock up the 
          edges with the back of a knife and transfer to a baking (cookie) 
          sheet. Brush with more egg white and bake in a preheated oven at 
          190°C/375°F/gas mark 5 for 25 minutes until golden and cooked through. 
          Cut each stick into 7.5 cm/3 in pieces. Dust with sifted icing sugar 
          and serve warm or cold with Classic Custard Sauce. 
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