Whisk together olive oil, garlic, lemon juice, pepper, and parsley in a bowl.
Pour the mixture into a large resealable plastic bag. Add shrimp, coat in the marinade, remove excess air, and seal the bag. Marinate in the fridge for 2 hours.
Preheat an outdoor grill for medium heat; lightly oil the grate. Lightly coat metal skewers with cooking spray.
Remove shrimp from the marinade, shaking off excess. Discard remaining marinade. Place about 5 shrimp on each skewer.
Grill until shrimp are bright pink and opaque, about 5 minutes; do not overcook.
Serve with lemon wedges, if desired. Enjoy!
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