Cut potatoes length ways into 1/2 x 1/2–inch sticks. Combine potatoes, oil, and lemon juice in large, resealable plastic bag; toss to coat.
In small bowl combine seasoned salt, cumin, and black pepper to make seasoning mix. Set aside.
Place potatoes in center of cooking grate. Grill 12 to 15 minutes or until tender, turning twice during grilling time. Remove from grill and sprinkle with seasoning mix; mix lightly.