Eat. Race. Win. https://www.amazon.com/Eat-Race-Win-Season-1/dp/B086HVQ5RB
Related, Unchained (https://www.netflix.com/title/81153133) has been an interesting view into the race although food isn't discussed at all.
Before Eat. Race. Win. I had this entirely uninformed idea the food the riders ate would be incredibly streamlined and controlled - I was thinking something like Soylent and protein powder and supplements. To see them chowing down on "normal" food and drinking alcohol (at all) was surprising for me.