。
Boil me one egg, will you?
Literal
Egg [object-を] one boil [emphasis-よ].
The sentence-final よ softens a casual request by asserting the speaker's expectation. Note how 一つ ('one') has no particle linking it to 卵 — Japanese counter expressions attach adverbially to the verb phrase, not to the noun they count, so they appear bare. This is a regular feature of counter syntax.