Boil fingerling potatoes in salted water for about 12 to 15 minutes, or until tender.
Drain potatoes from water and run under cold water until cool enough to handle, about room temperature.
Slice potatoes in half lengthwise and place in a medium bowl.
Add olive oil, salt, and pepper to potatoes and toss until well-incorporated.
Preheat grill to 450 degrees and, using direct heat, grill flat side down first, about 3 to 4 minutes until grill marks are achieved and potatoes are slightly charred. Flip potatoes and grill another 3 to 4 minutes.
Remove potatoes from grill and set aside until ready to plate.