How to Make It
In a large saucepan, heat the olive oil. Add the onion and garlic and cook over moderately low heat until softened, about 7 minutes. Add the oregano, black pepper, paprika, cayenne, crushed red pepper and cinnamon stick and cook, stirring, until fragrant. Add the honey, ketchup and mustard and cook over moderate heat until slightly thickened, about 5 minutes. Add the vinegar and demiglace and cook until thickened, about 10 minutes; let cool.
Put the ribs in 2 large resealable plastic bags. Add the sauce to the bags. Seal and refrigerate overnight.
Preheat the oven to 350°. Transfer the ribs and marinade to a large roasting pan and bake for 1 1/2 hours. Add the water to the pan, turn the ribs and bake for about 1 hour longer, until the ribs are very tender and thickly glazed. Discard the cinnamon stick. Transfer the ribs to a platter and serve.
Demiglace is available at specialty food shops and many supermarkets.