。
I'd like the eggs boiled, please.
Literal
Egg [object-を] boil-want-[explanatory-のです].
~てほしい means 'want [someone else] to do X' — note the contrast with ~たい, which is 'I want to do.' ~てほしい typically targets another person's action; the sentence here leaves the recipient of the request implicit. The explanatory のです softens the request into a framed statement of preference.