Chop the rosemary until minced. Place the garlic cloves in a food processor or blender along with rosemary until finely minced. Add the honey, mustard, vinegars and olive oil, and process until smooth. Reserve 1 cup for sauce. 
Place tenderloin in a resealable plastic bag and add remaining marinade. Seal and refrigerate for at least 4 hours or overnight. 
Preheat the grill to 375° F. Drain the marinade and place pork on the grill. Cook until internal temperature registers 150° F; usually takes about 30 minutes. Turn often to avoid burning. Slice thin and serve with the remaining marinade. 
Serves 4 
-- Submitted by: Chloetta Welch - Fairfield, California