He prepared a dish called "macaroni pie". This dish evolved to what Americans call macaroni and cheese today. In Paris, Jefferson became concerned that Hemings might learn that he could be free when France had abolished slavery in 1789.
Mac n Cheese is truly the pinnacle of Black American dishes, culture. While Thomas Jefferson is credited with bringing macaroni and cheese to the Americas, it was the work of his enslaved chef, James Hemings, that put the dish on the proverbial map and made it the truly celebrated dish of Americans to this day.