Preheat the oven to 200°C/fan 180°C/gas 6 and line 2 baking sheets with baking parchment
For the eclairs put the spread and sugar in a saucepan with 200ml water and heat gently until the spread has melted. Bring to a rolling boil then remove from the heat and add the flour to the pan and beat until smooth.
Return to the heat and cook for 1-2 minutes stirring constantly until the paste starts to come away from the sides of the pan. Spoon into a large bowl and leave to cool for a few minutes.
Add the eggs to the paste a little at a time, beating well between each addition. The dough should be glossy and smooth with a soft dropping consistency – you might not need to add all of the egg.
Spoon the dough into a large piping bag fitted with a 1.5cm plain nozzle and pipe 10cm lengths onto the baking sheets, leaving a 2cm gap between each one.
Bake in the oven for 20-25 minutes until golden and crisp. Remove from the oven and leave to cool slightly on the baking sheets. Then cut a slit down the side of each one and put on a wire rack to cool completely - this lets the steam escape and stops the eclairs going soggy.
For the filling, whip the cream and the icing sugar in a large bowl until soft peaks begin to form.
Spoon into a piping bag fitted with a 1cm nozzle and pipe cream into each cooled éclair, top each layer of cream with 3 or 4 raspberries.
Put the fondant icing sugar in a bowl and add a couple of tablespoons of cold water and beat until a smooth, thick icing forms, add a little more water if necessary. Beat in the raspberry dust.
Spread a thick layer of icing on top of each éclair and top the end of each one with a sprinkling of dried raspberry pieces