Lesson 4 Did You Eat
The verb "to eat" in French is "manger". To ask "Did you eat?" you can say the informal "As-tu mangé?" or "Est-ce que tu as mangé?". When speaking formally, as to a superior, use "Avez-vous mangé?" or "Est-ce que vous avez mangé?"
So....
Informal : " As-tu mangé? " OR...