This is my copycat recipe of my favorite brunch item at chef Robert St. John's Crescent City Grill. Shrimp and grits are a pretty classic Southern food, and this one is the definitive creole version in my opinion. Andouille and Boursin may not be available everywhere. To aid in substitution, Andouille is a spicy smoked sausage, and Boursin is a garlic flavored soft cheese spread. If you're an unfortunate soul who lives in a place with no grits, polenta is an acceptable substitution.