Polish name for this dish would be probably "jajka w koszulkach", but I guess it's not very popular here. I've eaten one once or twice, and consider it to be nothing special; had a "watery" taste. I guess it's easier to make soft boiled eggs.
And fry eggs are quite popular, often served with fried potatoes, as mid-day dish. Oh, and you should try kogel-mogel, raw egg yolks mixed with sugar (and little add-ons, like few drops of vodka or fresh lemon juice).
Related:
Where to buy egg whites in KrakówHi. Anybody knows where could I buy big bottles of egg whites in Kraków?
they don't have that here. rightfully so- chemical crap. buy eggs and separate the whites yourself.