Preheat the grill to 400F-450F at the grate level
Rub the tenderloins with olive oil, then apply the salt and the spices. If using soy sauce, apply together with oil, then apply the salt and the spices
Grill pork tenderloins over direct heat with the lid closed about 5 minutes per side, until the internal temperature of 140F. Remove from the grill and let rest
In the meantime, brush peach halves with grapeseed oil and place on the grill cut side down. Grill about 2 minutes per side, until you see visible grill marks and the peaches have softened
Slice the peaches in quarters. Slice the pork tenderloin to the desired thickness. Plate and add baby arugula. Sprinkle about a pinch of sea salt per peach to help balance out sweetness. It's optional, but I like it that way. Sprinkle some pine nuts. Drizzle some olive oil and balsamic vinegar, and serve hot