Preheat the oven to 450 degrees F.
To make the porchetta: Combine the rosemary, sage, garlic and crushed red pepper in a small bowl. Mix with enough olive oil until a loose paste has formed. Gently cut the sides of the pork so it opens up like a book and lies flat on your cutting board. Rub the oil mixture all over the inside of the pork shoulder (be sure to get it into every nook and cranny). Sprinkle generously with salt and pepper. Roll the pork and tie tightly with butcher's twine.
In a large roasting pan, combine all the vegetables and wine. Season with salt, to taste, and add the thyme and bay leaves. Nestle the pork on the vegetables. Rub the top of the pork with oil and put in the oven. Roast for 30 to 40 minutes until the skin starts to brown and becomes crispy.
Brush the skin with the pan juices and add some of the chicken stock on and around the pork. Roast for another 3 to 3 1/2 hours, basting the skin occasionally and adding more chicken stock to keep pan moist. If the skin becomes too dark, tent with aluminum foil and remove the foil during the last 30 minutes of cooking time.
Remove the pork from the pan to a cutting board and discard the string. Let rest for about 15 minutes. Cut the crispy skin from the meat and cut into pieces. Slice the meat. To serve, arrange some of the vegetables from the pan, drenched in juices, onto each serving plate and put slices of meat on top. Garnish with piece of crispy skin and serve.
Call yourself a "superstar" and eat leftovers the next day.