Begin by preparing the corn, spring onion, and tarragon.
Grease a gratin dish with butter and add torn pieces of bread.
In the dish, combine the shrimp, black pepper, salt, and cayenne.
Pour in a generous amount of cream and mix everything together thoroughly.
Dot the top with a bit of butter and sprinkle a good amount of Parmesan cheese over it.
Place the dish in a preheated oven at 450 degrees Fahrenheit.
After about 10 minutes, check if it's done; it should be bubbly and golden with the shrimp cooked perfectly.
Finish by garnishing with finely chopped chives and a squeeze of lemon juice to enhance the flavors.
