Wash all veggies very well

Scrape the carrots and remove the seeds from tomato

Grate the carrot and cabbage using the small holes of a grater

Cut the tomato into a very tiny pieces

Cut the hard-boiled egg into tiny pieces

Add mayonnaise to the carrot, tomato,egg and cabbage. Mix well and set aside

In a separate plate, mash the sardines with a fork and mix with the smellbof sardines, the margarine helps reduce the strong smell

Using a bread knife, cut off the crusty ends from the slices of bread

Take one slice of bread, spread the margarine and sardines mix on one side of it and cover with the second slice of bread

Repeat the above step with the remaining two slices. By now you should have two separate slices of bread that are stuck together by the margarine and sardine mix, like this

Now, take the first 2 slices, rub the carrot, cabbage,tomato, egg and mayonnaise mix on one side of it and cover with the other two slices

By now, all the slices of bread should be stuck together with 2 fillings of the sardine and margarine mix and 1 filling of the mayonnaise mix in the middle

Cut the sandwich into desired shapes and sizes