Three attempts before I dig even more into this. The starter? It's been smoked ham and cheese...not the point.
The point. The best thing to "seal" these with is a bit of flour and water.
With the ham and cheese testing trials ... so far, six minutes at 400...chunks of cheese off of a block...nice, crispy outside finish.
There's a croquettes type thing here. Serrano ham ... damn. It's coming.
FWIW, a scrambled egg in this...not done, runny, but warm. Messy.