Bullseye Barbecue Sauce

1/2 cup minced onions
1 (8 ounce) can tomato sauce
1 cup water
1 1/4 cups ketchup
2 teaspoons brown sugar
2 teaspoons prepared yellow mustard
1 teaspoon olive oil
1 teaspoon Worcestershire sauce
1 dash Tabasco sauce

Combine ingredients in a saucepan; cover and simmer for 30 minutes.