There is currently no minimum food order. Pomme frites and beignets are all I'll eat on their menu so it's all I order (and rarely both on the same visit because I can't eat that much in one sitting).
I prefer CO when it comes to beignets as they have sauces... Although on the odd times I get pommes frites as well, I usually dip them in the sauces instead of the beignets ::coughcough::