Pre-heat the oven to 160 degrees. Spray two baking trays with low calorie cooking spray and line with baking parchment.
Add the granulated sweetener, salt, reduced fat spread and water into a saucepan and bring to the boil. Take off the heat and mix in the flour. The mixture will look lumpy at first but persevere. Continue to mix until the mixture forms a ball and comes away from the sides of the saucepan. This will take a lot of elbow grease and may not come together for around 5 minutes.
Add the eggs to the mixture and stir well to incorporate. It will look split at first but continue to stir until the mixture becomes glossy.