Smoked Sausage Jambalaya with Bayou Fried Chicken

1. ¼ cup vegetable oil (reserved from Bayou Fried Chicken)
2. 1 yellow onion, minced
3. 3 stalks celery, minced
4. 1 green bell pepper, seeded and minced
5. 1 jalapeño, seeded and minced
6. 1 poblano pepper, minced
7. 3 cloves garlic, minced
8. 3 teaspoons kosher salt, divided
9. 1¼ teaspoons cayenne, divided
10. 1 pound smoked sausage, halved and sliced

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