Heat olive oil in a skillet over medium heat.

Add the finely chopped onion to the skillet and sauté until softened, about 5 minutes.

Add the peeled, seeded, and chopped tomatoes to the skillet.

Add the seeded and minced hot pepper, salt, and pepper to taste.

Stir the mixture until the sauce combines and thickens, about 10 minutes.

Stir in the vinegar and cook for another 2 minutes.

Serve the Creole tomato sauce warm or cold with meat or fish.