"This is a BBQ sauce my grandfather created a long time ago and I grew up having my mother use it all the time when we grilled out. Add this BBQ sauce to foods such as chicken, pork chops, and ribs for a added flavor and a little kick. Vinegar and mustard base adds a different flavor to original BBQ sauce."
Stir the vinegar, mustard, margarine, salt, black pepper, red pepper flakes, garlic, and sugar together in a saucepan over medium-high heat until the mixture comes to a boil. Reduce heat to medium-low and simmer until thickened, about 25 minutes.