Tiger Prawns are jumbo shrimp that are easily identifiable with the green stripe that runs every 1/4-inch across the tail. They are available in the seafood case at most grocery stores. However, feel free to substitute jumbo white or brown gulf shrimp in place of the tigers. Feel free to adjust the amount of garlic or lemon in this recipe to suit your personal taste. Personally, I love garlic and an additional squeeze of lemon in this classic Italian dish.