Melt the butter in a large sauce pan with the vegetable oil over medium high heat.
When the butter begins to froth add ½ cup of the onions. Cook, stirring occasionally, until the onions are golden brown.
Add the remaining onions, celery, and bell pepper, reduce the heat to medium and season with 1 Tbsp Creole Seasoning and a healthy pinch of salt. Sweat the vegetables until soft.
Add the tomato paste mixing well, and cook, stirring constantly, until the paste begins to brown, then add the fresh tomatoes and another healthy pinch of Kosher salt.
When the tomatoes start to break down into liquid add the white wine, and turn the heat to high until most of the alcohol burns off.
Add the Shrimp Stock, remaining Creole seasoning, garlic, bay leaves, black pepper, white pepper, cayenne (to taste), and Thyme. Bring to a boil then reduce to a low simmer. Simmer for 30-45 minutes.
If necessary at this point thicken the sauce with 1 Tbsp Cornstarch/ 2Tbsp water. Bring to a boil to maximize the thickening power of the cornstarch.
Add the hot sauce, Worcestershire, and season to taste with Kosher salt.
Make your Boiled Rice, and season your shrimp with 1 Tbsp Kosher salt and a pinch of Cayenne.
Bring the sauce to a boil, reduce the heat to low and add the shrimp. Let them slowly simmer in the sauce until just cooked through.
Serve with boiled rice and garnish with the remaining green onions and parsley. Serve immediately.
