Have fun with that. You need a catering permit and that requires a commissary and money for permits. Avoid their home base (the dream killers) on Central and talk to the mobile division on 16th and Roosevelt. They are the ones that regulate and inspect at farmers markets so deal with them. Realize that without a full trailer or food truck you will be very limited in what you can serve. They will let you serve what you made at your commissary but you can't "make" anything other than slopping meat on a bun. Also realize they are code followers. Learn to go with the flow and play their codes, ie. play dumb but wanting to follow the rules, to accomplish what you want to accomplish.