Make the surface of the toaster oily with some butter. 

Boil the eggs for 10-15 minutes

Mix the Sardine and butter/Mayonnaise together in a plate.

Slice the boiled eggs with an egg cutter or knife in a separate bowl

Place the bread on the toaster and spread the sardine and butter mixture.  Place the boiled eggs on it carefully, then Cover with the other slice of bread and toast. Leave in the toaster till it’s done. (usually when it’s golden brown).

Your sandwich is ready!!!! Best accompaniment to the sandwich is a hot cup of coffee ☕  Enjoy!!!