1. Preheat the oven to 325°. In a piece of cheesecloth, combine the peppercorns, bay leaf, fennel seeds, coriander seeds, thyme, parsley stems and orange peel. Gather the cloth and use a piece of butcher's twine to tie together the open end. Set aside.

2. Season the lamb with salt and pepper. In a large Dutch oven set over medium-high heat, heat the olive oil. Add half of the lamb pieces and brown them on all sides, about 7 minutes. Place the browned lamb in a bowl and brown the remaining lamb. Add the rest of the lamb to the bowl, cover with aluminum foil and set aside. Add the bacon to the pot. Cook until crisp, about 5 minutes, then add the onion, garlic, carrot and celery and cook, stirring occasionally, until softened, about 10 minutes.

3. Add the flour and cook, stirring frequently, for 2 minutes. Stir in the tomato paste and cook for 1 minute longer. Add the wine, vegetable stock, tomatoes and the reserved lamb. Season to taste with salt and pepper. Add the cheesecloth bundle and bring the mixture to a boil. Reduce to a simmer, cover the pot and place in the oven. Cook for 2½ hours. Reduce the oven temperature to 250°. Remove the lid and continue cooking, uncovered. Cook until the meat is very tender and the liquid has reduced slightly, about 45 minutes longer. Remove the pot from the oven and discard the cheesecloth. Serve the daube warm with the baguette.