Technically, a staple is something that everyone keeps in their kitchen and/or pantry. For instance; flour, sugar, salt, pepper, etc. But you can broaden the term and use it as Mr. Furches did, as a dish that everyone knows and loves. Other Kansas staples might be apple pie, homemade ice cream, fried chicken, and so on.
And Coach is making me hungry, for some pie and ice-cream but won't give in right now. One other thing coach, just Mike or Coach, the Mr. stuff while respectful, makes me feel older than I want to be.