Red Beans and Rice with Andouille Sausage

In a large pot or a Dutch oven, heat the fat, lard or oil over medium-high heat. Add the sausage and cook until golden, 5 to 7 minutes. Add the onion, bell pepper, celery, and garlic. Cook, stirring, until softened, 5 to 7 minutes. Stir in the cumin and thyme and cook for 1 minute. Add the beans, salt, hot sauce, bay leaves, and enough water to cover the beans by 2 inches. Bring the mixture to a boil. Immediately reduce to a simmer, cover, and cook for 1 1/2 hours. Uncover and simmer until the beans are tender and the sauce has thickened, 30 to 45 minutes, adding more water if necessary. Remove and discard the bay leaves. Serve over the rice, topped with the scallions. Garnish with the parsley.