I did the farmers market here for several years till I burned out. I had to do @20 loves of white bread, 10wheat, and tons of what called flavor bread: bannana, bannana nut, pumpkin, pinnapple, apple, blueberry, strawberry, beer bread. Ect. I made reg white and wheat size loaves and small and reg flavor size. And if I had a new flavor or one that wasn't selling well that day I would slice one up for samples.
Cinnamon rolls are great in the early morning cause people are hungry and want something breakfasty to eat so I would make cinn rolls with frosting and sticky rolls. I just took a loaf of bread dough and let it rise and rolled it flat smothered it with butter sugar and cinnamon, rolled it up and sliced it. Bake 6 in a round cake pan and frost or put butter and brown sugar (and touch of cinn). In the bottom then add rolls and bake. Just be generous with the butter-if there isn't enuff the carmel will be hard like candy. And do some individual ones for the people who are looking around (all that food makes people hungry) and they like to buy. The single ones. I did these with and with out nuts also.
(Eta...I did some of the popular kinds in sugar free. (Bannana, bannana-nut, pupkin and blueberry) the older ladies and diabetics are always on the lookout for sugar free!
Cookies for the kids! People will buy cookies to shut the kids up! They are fairly cheap. I offered 12 and 6 to pack and I would make some slightly larger ones and sell individualy. .25 or .50 cents doesn't sound like much but it added up.
Pies did ok but they are priceyer and just didn't sell tons of them. People were after cheap.
Here ours says anything home grown or home made. I did see jellies off and on.
Can you go see what people sell there? See what they sell and what is not yet avalable yet. Then you willl have a better idea what to make.
The egg guy here would sell out in less than an hour.