What you will need: 

1LB.    Pork Tenderloin
3Tbsp  Seasoned bread crumbs
1Tbsp  Grated parmesan cheese
1tsp    salt
1/8tsp pepper
Cooking oil spray
1 small onion, chopped
1 clove garlic, minced 

How to prepare:

Cut the tenderloin crosswise into 8 slices approximately 1” thick.
Place the cut side of the tenderloin down on it’s cut surface and flatten to ½” thickness.

Start heating large skillet to medium heat and coat skillet with cooking oil spray.

Combine the seasoned bread crumbs, parmesan cheese, salt and pepper in a large bowl.  Place flattened tenderloins in mixture and flip to coat the tenderloins.

Add coated tenderloins, onions, and garlic.  Sauté 8-10 minutes turning pork once and stirring vegetables every minute or so. A variation on this would be to use virgin olive oil instead of the cooking oil spray to coat the skillet.  I have also used regular vegetable oil in a pinch.  Don’t use butter. shivers