Dice the onion, bell pepper, and celery into uniform pieces (this helps them cook evenly), and mince the garlic. Cut the chicken into 1-inch cubes and toss with the blackened seasoning, making sure each piece is well coated—this is your flavor foundation. Slice the andouille sausage into 1/2-inch rounds. Having everything prepped and ready before you start cooking ensures smooth workflow and prevents overcooking any component.

Heat a large Dutch oven or heavy-bottomed pot over medium-high heat. Working in batches if needed to avoid crowding, sear the seasoned chicken cubes for 3-4 minutes per side until they develop a dark crust—don't worry if the internal temperature isn't fully cooked yet, as the chicken will finish cooking in the braising liquid. Remove the chicken and set aside, then sear the sausage rounds for 2-3 minutes per side until browned. The browning creates deep, caramelized flavors that are essential to jambalaya's character, so don't skip this step even though it takes a few extra minutes.

In the same pot with the rendered fat from the seared meats, add the diced onion, bell pepper, and celery. Sauté for 5-6 minutes, stirring occasionally, until the vegetables begin to soften and release their aromatics. Add the minced garlic and cook for another minute until fragrant. This classic combination—known as the holy trinity in Creole cooking—forms the aromatic foundation that gives jambalaya its distinctive depth.

Add the long-grain rice to the pot and stir constantly for 1-2 minutes, toasting it lightly in the vegetable mixture—this helps each grain stay separate and absorbs the flavors around it. Sprinkle in the dried thyme and cayenne pepper, and add the bay leaves. Stir to combine all the spices evenly throughout the rice and vegetables.

Pour in the chicken broth and crushed tomatoes, then stir in the Worcestershire sauce. Return the seared chicken and sausage to the pot, making sure everything is submerged. Bring to a simmer, then reduce heat to low, cover with a lid, and cook for 20-25 minutes until the rice is tender and has absorbed most of the liquid. I like to check the pot around the 20-minute mark to ensure the liquid isn't evaporating too quickly; if the top is drying out but the rice still feels firm, add a splash more broth. The covered simmer method ensures even cooking and keeps the rice from drying out.

Remove the pot from heat and let it rest uncovered for 5 minutes—this allows the rice to firm up slightly and distributes moisture evenly throughout the dish. Remove the bay leaves, fluff the jambalaya with a fork, and taste for seasoning. Adjust salt, cayenne, or Worcestershire to your preference. Serve hot in bowls, and if you'd like to add fresh green onions for brightness and color, scatter them over the top.