With the rack in the middle position, preheat the oven to 350°F (180°C).
Slice the pork tenderloin open. To do this, slice in half the entire length of the tenderloin without cutting all the way through, and open flat. Add the prosciutto slices, folding them if necessary, and then layer with the herbs. Fold to close. Tie securely with butcher’s twine.
In an ovenproof skillet, heat the oil with the garlic. Brown the meat on all sides. Season with salt and pepper. Bake for 10 to 15 minutes for medium rare, depending on the size of the tenderloin. Cover with aluminum foil and let rest for 5 minutes.
Slice the tenderloin and serve with roasted baby potatoes and yellow wax beans, if desired.
Recipes with the "Healthy Pick" stamp have been evaluated by a registered dietitian member of the Ordre professionnel des diététistes du Québec.