Cut tenderloin crosswise into slices about 1 inch thick.
Flatten each slice to 1/2-inch thickness.
Combine crumbs, cheese, salt and pepper.
Dredge pork slices to coat.
Add oil to a large heavy skillet.
Pan-fry meat slowly with onion and garlic about 8 minutes.
If meat is done first remove it to a plate and keep warm and continue to cook the onion and garlic until softened.
Serve pork slices with onion and garlic.