In a Dutch oven, heat vegetable oil over medium-high heat.
Add sliced sausage and brown for 3 minutes per side.
Add diced onions, celery, and jalapeño peppers to the pot. Cook for 5 minutes, until slightly browned.
Stir in the flour.
Add the cooked red beans, diced mango, diced Roma tomato, chicken bouillon powder, bay leaf, molasses, cayenne pepper, minced garlic, garlic powder, black pepper, and celery seed.
Pour in enough water to cover the ingredients. Bring to a boil, then reduce heat to a simmer.
Cook for 1 hour, adding more water if needed to maintain consistency.
Once the beans and mango are softened, adjust seasonings to taste. Remove the lid to allow the mixture to thicken to your desired consistency.
Turn off the heat and stir in the butter and lime juice just before serving.
Garnish with fresh cilantro and a lime wedge, if desired.