Heat a medium skillet on medium-high heat and add oil, followed by garlic, onions, celery, bell pepper, green onions, oregano, and thyme. Cook for 3-4 minutes until onion wilts.
Add tomatoes, Worcestershire sauce, chicken broth, Creole seasoning, and cayenne pepper.
Bring to a boil, then reduce heat to low. Simmer until sauce slightly thickens, 15-20 minutes. Adjust with stock as needed.
Stir in green onions, cook for another minute, and add butter until melted.
Adjust seasonings with salt and pepper to taste, remove from heat, and serve warm with fish or desired protein.