Mix the oil, Curry Powder, Garlic Granules, Onion Salt and Paprika in a small bowl. Place the chicken in a large re-sealable plastic bag or glass dish. Add the curry marinade and turn to coat well.
Cover and leave to marinade for 30 minutes, or for best results overnight in the refrigerator. Remove from the refrigerator 30 minutes prior to cooking.
Grill the chicken over a medium-heat for 6-7 minutes per side, or until the chicken is cooked through.