Grilled King Prawns with Bloody Mary Butter - I Quit Sugar

Ingredients

• 12 large raw king prawns
• 1 handful watercress sprigs
• lime wedges, to serve
• 60 g butter, softened
• 1 garlic clove, very finely chopped
• 2 teaspoons Tabasco or hot sauce
• 1 teaspoon sweet paprika
• 1 tablespoon tomato paste
• 1 teaspoon Worcestershire sauce
• pinch sea salt
• 250 g curly parsley, leaves picked
• 60 ml extra virgin olive oil
• sea salt