Spreading fat on the base of your sandwich serves two purposes:
- It gives another taste that will blend with and enhance the other ingredients in the recipe
- It forms a barrier to humidity, protecting the bread from the moisture that migrates from the ingredients (preventing the crumb from becoming spongy)
What should you spread on the bread?
Traditionally the spread used is butter, but don't hesitate to use more original spreads that will provide more flavour:
Fromage frais + chopped chives or dill
Fromage frais + lemon juice
Honey + mustard