חיוב אכילה בסוכה

[FelixHarari]

When are you obligated to eat in the Sukkah and say a berachah לישב בסוכה?

Hamotzi?

Mezonot?

Breakfast Cereal?

Kiddush on Shabbat / Yom Tov?

[Yisrael.Kleinhendler]

Not Cereal. The others.