Sardines (70%), churned butter (milk) (26.5%), lemon juice (2.3%), salt.

To be served hot, these sardines in churned butter with a hint of lemon offer a modern version of a traditional recipe. 
Before heating them, run the tin under warm water to melt the butter. Empty the contents of the tin into a frying pan over and warm over very gentle heat to preserve the soft texture of the flesh.