Begin by pouring chicken broth into a medium pot and bringing it to a rolling boil over high heat. Once boiling, add the long-grain white rice, then reduce the heat to low, cover, and let it simmer for 15 minutes.

While the rice is cooking, heat a large skillet over medium heat and add a splash of vegetable oil. Add the ground beef and ground chicken, breaking it apart with a spatula. Cook for about 5-7 minutes, stirring until fully browned.

Stir in finely chopped onion, diced green bell pepper, and diced celery into the skillet with the browned meat. Cook for 3-4 minutes, stirring occasionally, until the vegetables soften.

Mix in tomato paste along with Cajun seasoning, black pepper, and cayenne. Stir until the mixture is evenly coated with the spices and simmer for an additional 2-3 minutes.

Once the rice is cooked, fluff it with a fork and add it to the skillet with the seasoned meat and vegetables. Stir for about 2-3 minutes until well mixed.

Taste and adjust seasoning if necessary, then transfer to a serving dish, garnishing with chopped green onions.