Rinse the rice under cold water until the water runs clear to remove excess starch. Drain and set aside.
In a large saucepan, heat the vegetable oil over medium heat. Add the chopped onion, bell pepper, and celery (the holy trinity) and sauté for about 5 minutes until softened.
Stir in the minced garlic and cook for an additional minute until fragrant.
Add the ground turkey or chicken, and cook until browned, breaking it apart with a spatula.
Incorporate the diced andouille sausage if using, and cook for another 3-4 minutes.
Sprinkle in the Cajun seasoning, smoked paprika, and cayenne pepper. Stir well to combine and toast the spices for a minute.
Add the rinsed rice to the pot, stirring thoroughly to coat the rice with the mixture.
Pour in the chicken broth and bring to a boil. Once boiling, reduce the heat to low, cover, and let it simmer for about 20 minutes or until rice is cooked and liquid is absorbed.
In the last 5 minutes of cooking, add the frozen mixed vegetables to the pot, stirring gently to combine them with the rice.
Remove from heat and let sit for 5 minutes. Fluff the rice with a fork, then season with salt and pepper to taste.
Serve hot, garnished with sliced green onions and fresh parsley.
Notes
Adjust the cayenne pepper to taste for desired spiciness.