I like to write short historic fiction and I try to do so with great detail and accuracy. So I'm curious, with trade, market availabilities and home grown crops or livestock products, what kind of foods would be on the dinner plate of an average person in say, Britain, c. 1805? Would an average market have tomatoes, or bananas, etc.?

Today we can go to the store and get bananas, avocados, or other more exotic fruits and vegetables at a very affordable price. This makes me curious as to whether 200 years ago or not this was the same. I'm certain that it wasn't, but I wonder which foods would be easily purchased. At a historic site one time, I was able to try a recipe of original hot chocolate, which was a beverage consumed strictly by the upper classes, as its ingredients were super exotic and expensive (if I remember correctly amongst those ingredients, obviously imported cocoa from South America as well as hot peppers were amongst them). For those curious, it tasted nothing like our modern hot chocolate of course. It was very thick, and the flavour is hard to describe. It was interesting and kind of good though. If I remember correctly the recipe was from the 1780s, and was the type that British gentlemen and ladies would enjoy.

In short, what would the diets of the lower, middle, and upper classes consist of at the mentioned time period? What would be on the dinner table of these peoples, both imported and domestic?