Easy Barbecue Sauce

This is excellent on ribs or chicken.

2 tablespoons vegetable oil
1 medium onion, chopped
3 cans tomato sauce
1 cup vinegar
1/2 cup molasses or firmly packed brown sugar
2 tablespoons Worcestershire sauce
1 teaspoon coarse black pepper

Saut onions in oil for about 10 minutes. Add remaining ingredients and simmer for 45 minutes. If it gets too thick, add a little water.