Croquette / Donuts

Creative chefs make the craziest things. This is Terraza Carmona again where I go sometimes to have the gourmet version of tapas; more like what you might encounter in a north american so-called tapas place. This is a croquette but made in the shape of a little donut.

I want to know how this is done. I suspect the filling might be frozen at one point. That’s the only way I can figure they’d hold their form to be breaded.