One of the ways to create a crispy crust on food that doesn’t already have one is to bread it. The standard method is to use a flour, egg, and bread crumb trio.
Set up three dishes, the first with flour, and the second with 1 or 2 eggs beaten to uniformity, and the third with bread crumbs. I prefer panko, Japanese bread crumbs that are good for frying because they stay especially dry and crisp. Dip the food in the flour to give it a dry surface. Then dip it in the egg, which will adhere to the dry flour. Next dredge the food in the bread crumbs, which will adhere to the wet egg.