Take a stockpot (or a very large, deep sauté pan) and heat up 2 tbsp vegetable oil or butter in a pot over medium-high heat or simply Dutch oven over medium heat. Now season the sausage and boneless chicken bite-size pieces with half of the Cajun Seasoning andsauté for 5-7 minutes, stirring occasionally, until the chicken cooked through and the sausage is lightly browned. Transfer to a clean plate and set aside.
Add the remaining oil to the stockpot. Add bell pepper, celery, jalapeno, onion, and garlic. Sauté for almost 6 minutes, stirring from time to time, until the onions become softened.
Now gradually add the crushed tomatoes, chicken stock, rice, Cajun seasoning, thyme, oregano, cayenne, red pepper flakes, bay leaf, and stir to combine. Continue cooking until the gravy seems to a perfect simmer.
After that reduce heat to medium-low, cover the pot and simmer for a maximum of about 20-25 minutes, or until the rice is nearly cooked through, stirring every 5 minutes, so the rice does not cook or burn.
Now add okra and stir to combine. Stir in the chicken and sausage, cook for about 5 minutes more while stirring continuously, now simply remove the heat and discard the bay leaf.
Place the shrimp on top of the jambalaya mixture, stir through gently and cover with a lid. Allow to simmering while stirring occasionally and give a good mix until shrimps are perfectly cooked through and get a pinkish color.
Seasoned with the extra salt and black pepper powder, If needed, and remove from heat. Adjust heat with extra hot sauce, Cayenne pepper, or Cajun seasoning.
Now garnished the bowl with green onions and fresh parsley. Serve hot immediately.