Feijoada: Brazilian Black Bean Stew

Name: Feijoada: Brazilian Black Bean Stew
Ingredients: 8 ounces carne seca (optional); 1 pound pork shoulder, cut into 2-inch pieces; 1 pound fresh pork belly, cut into 2-inch strips; 3/4 pound smoked ham hock; 4 ounces pancetta, cubed; 11/2 pounds linguica, chorizo, or other spicy fresh sausage; 1 pound dried black beans, picked and rinsed; 3 tablespoons olive oil; 5 garlic cloves, finely minced; 1 large onion, finely diced; 2 scallions, white and green parts, chopped; 2 fresh bay leaves; Kosher salt and freshly ground; black pepper; Cayenne pepper; Paprika; Freshly grated nutmeg; 1/4 cup chopped fresh cilantro; 1/4 cup chopped fresh parsley; 2 cups basmati or jasmine rice; 5 tablespoons extra virgin olive oil; 1 medium onion, finely diced; kosher salt and freshly ground; 1 bunch of collard greens; 3 garlic cloves, finely minced; 2 tablespoons unsalted butter; 1½ cups toasted manioc flour (farinha de mandioca); 4 scallions, finely chopped, green parts reserved for garnish; 5 navel oranges, peeled and cut into segments, for garnish