Peel and devein the shrimp and reserve the shells.
In a bowl, toss the shrimp with one tablespoon of the creole Seasoning and a few turns of freshly ground black pepper.
Add one tablespoon oil to a an eight or ten-inch cast iron skillet over medium-high heat.
Add the shrimp shells and toast for one minute.
Add the onions and cook for one more minute.
Add the garlic, beer, stock, Worcestershire, lemon juice, hot sauce, rosemary, and bay leaves.
Bring to a boil, tirn down the heat to a high simmer, and simmer for 30 minutes
Strain and reserve.
Make the grits while the sauce is simmering, and they should be ready at the same time.
For the grits, bring three cups of water to a boil.
Slowly whisk in the grits, and continue to whisk for about ten minutes.
Let cook on medium-low heat, whisking occasionally.
Whisk in the cream and chicken stock.
Whisk in the cheese.
Taste and season with kosher salt if needed
Add more stock or cream if needed for the consistency you like.
Turn off the heat and add two tablespoons of butter, place a lid on the pot, and set to the back of the stove until you are ready to plate.
In the pan you made the sauce in, and no need to wash it! Place it over medium-high heat and add one tablespoon of oil.
When hot add the shrimp in a single layer without overlapping.
Cook on each side for two minutes.
Pour in the reserved stock you made, and let boil for two minutes.
Turn off the heat, and one tablespoon at a time whisk in the stick of butter.
To serve, on a shallow bowl, place the grits and cover with the shrimp and gravy.