in a small bowl mix the olive oil, orange juice, Provençale blend, and salt
brush the pork all over with the marinade and refrigerate for 30 minutes or overnight
For a gas grill, heat one side to 375 degrees medium heat and leave the other side unlit.
Place the tenderloin over the direct heat, cover and cook for 7 minutes each side, flipping it once. If it chars too much move to the indirect heat for around 20 minutes.
I use a meat thermometer and when the internal temperature in the middle of the thickest part of the tenderloin reaches 145°F it is cooked, medium.
Remove the meat from the grill and leave to rest for 5 minutes before slicing into 1 inch pieces.
While the pork is cooking, brush the peaches with a little olive oil and place face down on the grill for 7-8 minutes. Turn once during cooking then remove from the grill.
Serve the pork alongside the peaches, and a dressed green salad with walnuts