In a mixing bowl, combine 1/4 cup of olive oil, 4 minced garlic cloves, and the juice of 1 lemon, creating a fragrant marinade. Add 1 pound of large, shelled prawns and marinate in the refrigerator for up to 24 hours.

Preheat your grill to high heat, aiming for around 500°F. Lightly oil the grill grates with a paper towel soaked in olive oil to prevent sticking.

Place the marinated prawns directly onto the hot grill grates. Grill for 2-3 minutes on one side until opaque, then flip and grill for another 2-3 minutes until fully cooked through.

Remove the prawns from the heat and serve immediately, garnished with lemon wedges if desired.