Here are some common food idioms:

1. “Piece of cake” – Refers to something that is very easy to do.
2. “Spill the beans” – Means to reveal a secret or confidential information.
3. “The icing on the cake” – Refers to something that makes a good situation even better.
4. “Bring home the bacon” – Means to earn a living or provide for the family.
5. “Couch potato” – Describes a person who spends a lot of time sitting or lying down, usually watching television.
6. “Apples and oranges” – Used to compare two things that are very different and cannot be compared directly.
7. “Hot potato” – Refers to a difficult or sensitive issue that no one wants to deal with.
8. “In a pickle” – Means being in a difficult or challenging situation.
9. “Salt of the earth” – Refers to a person who is genuine, reliable, and trustworthy.
10. “Spice things up” – Means to make something more interesting or exciting.

I hope you find these food idioms useful! Let me know if there’s anything else I can help you with.