Braised Lamb Shank Ravioli

Name: Braised Lamb Shank Ravioli
Ingredients: 1 1–1¼-pound lamb shank; Kosher salt, freshly ground black pepper; 2 tablespoons canola oil; 3 medium shallots, chopped (about 1½ cups); 4 large garlic cloves, crushed; 2 tablespoons tomato paste; 1 cup red wine; 4 cups low-sodium chicken stock or broth; 2 bay leaves; 7 sprigs thyme, divided; 3 tablespoons olive oil; 2 medium onions, thinly sliced; 3 ounces Parmesan, coarsely grated (about ¾ cup); 1 14.5-ounce can whole peeled tomatoes; ¼ cup (½ stick) unsalted butter; ½ teaspoon red wine vinegar; Cornmeal or semolina flour (for dusting); Fresh Pasta Dough; 1 large egg, beaten to blend; Kosher salt; Coarsely grated Parmesan and thyme leaves (for serving)