Preheat the oven to 275°F.
Brush the ribs with mustard and then sprinkle with salt and pepper.
Arrange the ribs on a baking tray and cover with foil. Bake in the oven for 2 hours or until tender.
Remove the meat from the oven and pour off the liquid. Baste the ribs with barbecue sauce on both sides. Bake uncovered for 15–30 minutes. The meat should be tender to the point of falling apart.