I love visiting Farmers' markets and Goshen is a recent addition to my list. Till now my experience had been visiting this place in the winter and it's more like a flea market than Farmers market it you wish to compare it by definition. There are barely a handful of them, one selling apples, two for salads, and they may carry small produce items like carrots and greens. These generally don't last till after noon (in quantity). Also, I'm not sure if they grow is themselves or are reselling.
There is one fresh smoothie maker who also carries cheeses and few snacks items. One guac guy (I haven't tried him as yet, but will soon). Two I believe are selling meat products, one selling jams and spreads, and three sell bakery items. Apart from food, there are handmade soap products, pottery items, succulent plants, shirts and a compost guy. There are a couple of permanent stores in here I believe apart from what I have already mentioned.
One is a cheese store and the other is Anna's bakery. The bakery has sitting space so you could have breakfast or brunch here during market hours (which I believe are Saturday, 9-1pm). There is not plenty of parking but whatever it is, it's tucked behind the building. The potters guild and a handful of other businesses are also running in the same complex. Overall, I expect spring/summer to be more lively and more produce items to be available. The bakery items are little pricy but you do have gluten free and vegan options. So that's a relief. Must plan a trip as this is indoors so little chance of cancelling if there is bad weather. Have a good time!