Drain and rinse the sweetcorn. Place the corn in a blender with three cups of water and blend until the corn is still slightly coarse, not mashed. Pour into a saucepan and bring to the boil.
Add the sugar, turn to low heat and simmer for 2 minutes. Beat the eggs with 1 tablespoon water.
Gently pour the eggs into the pan while stirring to create 'egg flowers.' Bring to a boil and add the cornflour paste. Stir until the soup is slightly thickened and serve.
Tip
Mixing the eggs with water before pouring into the soup helps keep the egg flowers small and fine.