Capecitabine tables

I have been put on a treatment of phesgo and capecitabine tablets. Had the phesgo injection today and so far no side effects. 

I start 6 tablets twice a day tomorrow, I know you need to have something to eat before taking them. 

Being daft asking but how much do you have to eat. Is it just something in your stomach or a meal

Sorry to ask, I forgot to ask the nurse today.

Thanks