Add diced tomatoes, chicken, bell peppers, onion, taco seasoning, salt, black pepper, and cayenne to the slow cooker. Stir to mix.
Pour in water and uncooked rice, ensuring everything is evenly combined.
Cover and cook on LOW for 4-6 hours or until the chicken is tender and the rice is fully cooked.
Stir once halfway through to ensure even cooking.
Taste and adjust seasoning if needed.
Serve warm with your favorite toppings like cheese, cilantro, or avocado.
Pair it with Honey Butter Cornbread Poppers or end with a sweet Strawberry Icebox Pie!