My FAVORITE pork sandwich

INGREDIENTS
-Ciabatta
-Pork tenderloin
-fresh black pepper
-brown sugar
-garlic powder onion powder
-paprika
-cayenne
-olive oil
-1 large onion sliced
-5 sprigs oregano fresh
-2 sprigs rosemary fresh
-4 cups Beef broth
-Salsa verde (food processor)
- 2 cloves garlic
-fresh lemon juice
-parsley
-basil leaves
-salt and pepper
- ½ cup olive oil
-2 teaspoons dried chili flakes optional
-Provolone