Rub pork butt with 2 tablespoons Cajun seasoning, 1 tablespoon salt, and 1 tablespoon black pepper. Place, fat side up, in a roasting pan; cover tightly with foil.
Bake for 45 minutes. Reduce oven temperature to 300°, and bake for 5 hours more. Let cool completely. Using a fork, shred meat.
In a large Dutch oven, heat oil over medium heat. Add tasso, and cook, stirring frequently, until browned. Remove tasso using a slotted spoon, and let drain on paper towels.
In same pot, heat Stovetop Roux over medium heat, stirring constantly, until simmering. Add all onions, poblano, bell pepper, celery, jalapeño, and garlic. Cook, stirring frequently, until vegetables are tender, about 5 minutes. Add broth, tomatoes, dried peppers, mole, bay leaves, remaining 1 tablespoon Cajun seasoning, remaining 1 tablespoon salt, and remaining 1 tablespoon black pepper. Bring to a boil over high heat. Reduce heat to medium, and simmer for 30 minutes. Serve over rice. Garnish with cilantro, if desired.
Notes
Kitchen Tip: Tasso is spicy, smoked pork butt that is common throughout south Louisiana. If it’s not available at your local market, coat smoked ham with some Cajun seasoning, or order it online at cajungrocer.com.
Recipe by Southern Cast Iron at https://southerncastiron.com/roasted-pork-tasso-gumbo/