Delicately butterfly the prawns by making a shallow incision along the back of each prawn and gently removing the vein. Carefully unfold the prawns to create a butterfly-like appearance.
In a mixing bowl, combine the softened butter, minced garlic, chopped parsley, a pinch of salt, and a dash of black pepper. Add a spritz of lemon juice to the mixture. Thoroughly stir to produce a fragrant and flavorful blend of garlic and herbs.
Using a pastry brush or spoon, generously coat both sides of the butterflied prawns with the prepared garlic herb butter mixture. Ensure that the butter is applied to the cuts made in the prawns.
Heat your pan to medium-high temperature. Place the prawns coated with the garlic butter mixture directly onto the grill grates. Grill each side for approximately 2 minutes or until the prawns display a pink and opaque appearance. Be cautious not to overcook, as prawns can toughen if cooked excessively.
During the cooking process, intermittently brush the prawns with additional garlic herb butter to infuse them with extra layers of flavor.
Once the prawns are thoroughly cooked and exhibit grill marks, carefully remove them from the grill. Serve them while still hot, serving as either a delectable appetizer or a satisfying main course. For an added burst of zest, provide lemon wedges alongside. Enjoy!