Backyard Bbq Sauce - cooking recipe

Ingredients

1 tablespoon vegetable oil
1 medium yellow onion, chopped as finely as you can
4 garlic cloves, minced
1/4 teaspoon salt
1 teaspoon red pepper flakes
28 ounces crushed tomatoes
1/3 cup molasses
1/3 cup white vinegar
2 tablespoons sugar
1 tablespoon prepared yellow mustard
2 teaspoons liquid smoke

Preparation

Preheat a saucepan over medium heat. Place the onions in the pan and saute in oil until browned (about 7 min). Add the garlic and saute for another minute. Add all the other ingredients except the mustard and liquid smoke, and cook for at least 30 minutes and up to 1 hour, uncovered, stirring occasionally.
Lower the heat if the sauce begins to splatter everywhere. Add the mustard and liquid smoke and taste for sweetness/sourness. Adjust the flavors if you think it's necessary, and cook for 5 more minutes. If you like a smooth BBQ sauce then puree it, but thats not entirely necessary.