Method:
Whisk together the eggs, sugar, and lemon juice in a stainless bowl then place them over a saucepan with a simmering water, keep stirring till the mixture gets thick.
Remove from heat, strain it to get rid of any lumps, whisk in butter and lemon zest then allow to cool.
Note:
Can be stored in a good container/ jar for up to 5 days in refrigerator.
Can be used to fill any type of desserts but not to be cooked in oven.