It's not hard to build your own sand box....I did....now I get to play with all kinds of folks.
6 years ago the tall white hat guys wouldn't let me play, so I found some cool friends and opened my own playground.
Trite saying but, "If you build it they'll come"....my rules are tough for some...use local seasonal food....within the past week I've had two chefs wanna add out of season shtuff.
At market we have:
delicata squash, zucchini, pittypan, babies with blossoms still on um, blossoms separate
Walla walla onions, torpedo, chippione, scallions, garlic scapes, green garlic, shallots, white onions, and another couple varieties
baby lettuce mix, ice berg, arugula, spicy greens, micro greens, sunflower sprouts
red new, yukon gold, french fingerlings, Caribe blue, and a few other potatoes
tomatoes....cherry and large ones....heirlooms are not quite in
black raspberries,blue berries and peaches
a few peppers
carrots, parisian, fingers, nubby ones
Japanese turnips and the purple top ones
dinasaur kale, russian kale, curly
swiss chard...neon rainbow and red
kohlrabi
honey, eggs, lamb, chevre (herb, garlic, chipotle), bison, chicken
herbs including shiso and epizote
Beets, chioggia, golden, cylindrical, bulls blood, etc.....
cukes...english, pickling and regular
cabbage
There is no eggplant out and one guy wanted to make an eggplant dish. Another wanted to make a spinach dish....no spinach. So....with the foremost rule of doing a cooking demo at the market is you use market food. My sandbox, my rules.