01 - Heat vegetable oil in a large skillet or Dutch oven over medium-high heat. Add ground beef and cook, breaking apart with a spoon, until browned and cooked through, approximately 5 to 7 minutes. Drain excess fat if necessary.
02 - Add onion, bell pepper, celery, and garlic to the skillet. Sauté until vegetables are softened, about 5 minutes.
03 - Stir in Cajun seasoning, paprika, thyme, oregano, black pepper, salt, and cayenne pepper. Cook for 1 minute until fragrant.
04 - Add uncooked rice to the skillet, stirring well to coat the grains evenly with the spice mixture and rendered fat.
05 - Pour in chicken broth and bring to a boil. Reduce heat to low, cover, and simmer for 18 to 20 minutes until rice is tender and liquid is fully absorbed.
06 - Remove from heat and let rice rest covered for 5 minutes. Fluff gently with a fork before serving.
07 - Top with thinly sliced green onions and serve hot.