In the past, when I wanted to throw together a quick summer dinner, I’d rely on grilled meat with a packaged, processed barbecue sauce. But this summer, I’ve learned that it’s possible to prepare a homemade barbecue sauce in about the time it takes for Meat-and-Potatoes-Guy to heat up the grill and cook up some pork chops. Start to finish, my addictive, slightly sweet, slightly…