Lemon Garlic Butter Shrimp

butter (, divided)

garlic (, minced (or 1 tablespoon))

| 800 grams shrimp ((or prawns), peeled and deveined, tails intact)

Kosher salt and freshly ground black pepper (, to taste)

Juice of half a lemon ((about 2 tablespoons -- add more if desired))

water

Fresh chopped parsley (, to garnish)