had breakfast, ate breakfast
Вы завтракали сегодня утром?
Did you have breakfast this morning?
Вы вообще завтракали?
Did you even have breakfast?
Во сколько вы завтракали?
What time did you have breakfast?
Однажды мы там завтракали.
We had breakfast there once.
— Могила светлячков (1988)
Вы уже завтракали?
Have you had breakfast yet?
— Психо (1960)