This is a SERIOUS question... I am having my new in-laws here for Thanksgiving.... I have never met most of them

This is my new son-in-law's family - his Dad, Grandmother, brother, and 2 or 4 elderly mormon aunts/uncles/ cousins from Provo?, Utah.

Adam - my son-in-law, confesses "he doesn't know them well"... but he DID warn me they they don't drink alcohol, caffiene or carbonated beverages. (Heck - I'm Lutheran - our church doesn't care what we do! )

I admit I'm getting stressed out here now... anyone have any some tips on what grass-root Mormons prefer? (besides the safety of Denny's??? )
Or what I should absoletely NOT offer them?

I really want to make them feel welcome... and make sure I have things on hand that they will enjoy... so if you knows, please let me know.