Bring to a boil the lemon and mandarin juice with 2 lime leafs and the zest from 2 lemons and 2 mandarins.

Mix together the eggs, sugar and corn flour with a whisk.

Pour the hot citrus juice on the egg mix and whisk on the stove for about 2 minutes.

Using a hand blender add the cold butter to the hot cream made before. Add the butter step by step untill u get a creamy texture.

Put in any mold u like and freeze after serve.