Or you could also say..
"Estas mia mangxo la suko" for more emphasis on the "is"
Oh, thank you for the new word! "It was a joke."
ŝerco = joke (noun)
ŝerci = joke (verb)
Please tell me I'm not the only one who somehow thought that was sugar and not juice?
Yea, they're much closer in Esperanto than in english. Not the worst group of mistakable words in Esperanto that I know of though.
Meal does not take the accusative ending (-n) because of the preposition kun
The preposition "kun" makes "kun la manĝo" a prepositional phrase; therefore the noun doesn't receive the accusative ending.