You see, the thing is that first worlders (and wealthy people in general, this is an increasing trend) have never had to think where their food comes from. Their all-(US)American cup of black joe comes from coffee beans harvested in South America, from a plant originally domesticated in the Arabian Peninsula. From the way most fantasy is with potatoes, you would think they come from say, Germany, and not the Andes (and I'm sure some people believe that). People in the first world have unprecedented access to food (and other items) from all over the world, including items that were luxuries to most people not long ago, and they don't really think that much of it.
Of course my space captain drinks coffee, I do! How hard would it to get coffee in space (really hard), I drink it all the time! Of course my fantasy wizard eats a stew with potatoes and tomatoes (domesticated in the American continent) and seasons it with pepper (an item so incredibly valuable in medieval europe it was worth its weight on literal gold), I do, I mean, you get potatoes and pepper from like, the store, right?
I'm not saying you have to include a cited ethnobotanical paper on the history of food in your world detailing domestication centers, varieties and social effects (I'm actually 100% saying that), but the mere act of researching where your food comes from, not only now but its history, will make you not only a better writer but also increase your concioussness about the world. You will learn history, ecology, botany, zoology, culture, social issues, perhaps even a few recipes. And hey, maybe instead of making another Standard European Fantasy World, you might set your next novel in some other place with more spice, or maybe include a Turkish or Persian space captain interested in the history and culture of tea, something that isn't your Standard USAmerican Space Crew.
try it.