Simple Garlic Shrimp

INGREDIENTS

• 1 1/2 tablespoons olive oil
• 1 pound shrimp, peeled and deveined
• salt to taste
• 6 cloves garlic, finely minced
• 1/4 teaspoon red pepper flakes
• 3 tablespoons lemon juice
• 1 tablespoon caper brine
• 1 1/2 teaspoons cold butter
• 1/3 cup chopped Italian flat leaf parsley, divided
• 1 1/2 tablespoons cold butter
• water, as needed