Use anything you want for pizza crust.
They sell packets to make your own crust, Crust that is made already and Crust that comes in a tube like Refrigerator biscuits. We have also used the crescent rolls that came in a tube before. In that case line the pan with them so they are flattened out like a crust.
Cook the crust and let it cool.
Mix cream cheese with a ranch packet to flavor and spread it on the crust. Be sure to add your Ranch a little at a time and taste it so you don't get it to strong. Top with your choice of veggies like carrots, broccoli, radish, onion or whatever you prefer.