Peel and finely chop the onion. Heat the oil in a pot and sauté the onion. Add tomato paste and sauté briefly. Deglaze with tomatoes.
Stir in maple syrup and whiskey. Season with paprika. Simmer at medium heat for about 30 minutes, chopping tomatoes. Season sauce with salt and pepper.
TIP: If the sauce is used for Pulled Pork, you can fold it in portions when you pluck the roast.