Porchetta with Roasted Fingerlings

Name: Porchetta with Roasted Fingerlings
Ingredients: 1 bunch fresh rosemary, leaves finely chopped; 1 bunch fresh sage, leaves finely chopped; 20 garlic cloves, thinly sliced; 1 tablespoon crushed red pepper flakes; Extra-virgin olive oil; 1 picnic shoulder of pork with the skin, bone removed; Kosher salt and freshly ground black pepper; 2 large Spanish onions, diced; 10 garlic cloves, smashed; 1 pound fingerling potatoes, cut lengthwise; 2 pints Brussels sprouts, halved; 1 celery root, cut in 1/2-inch dice; 2 large carrots, peeled and cut into 1/2-inch dice; 2 ribs celery, cut into 1/2-inch dice; 1 bottle dry white wine; Kosher salt; 1 bundle fresh thyme; 10 bay leaves; 2 quarts chicken stock