Milanesa is essentially a chicken-friend steak you'd find in the Southern United States. Insome places, you can get the Milanesa style for chicken and some fish.
Here's a quick shot of one I had recently from El Club de Milanesa in Palermo.
It's a pounded flat piece of chicken, lightly breaded and fried. It's then topped with a razor thin piece of smoked ham, topped with a tomato sauce and then melted mozzarella. So it's basically a pizza with meat instead of dough. I'll take it over a US style "chicken parm" any day.