I grew up with this chicken and rice casserole recipe. My Grandmother got it from a lady from church at a potluck a long time ago! She passed it down to my mom and it's always been a family favorite. Quick and easy for school nights, and the leftovers are just as good! You can use less butter on top of course, my Momma and Mamaw always put the full stick on top (gotta love Southern ladies and their butter!)
For a richer, deeper flavor, consider browning the cubed chicken breast before adding it to the casserole; this develops a maillard reaction, adding complexity. Replace water with chicken broth for a more savory base. To elevate the dish, sauté a small amount of diced onion and garlic before combining with other ingredients. Ensure your instant rice is thoroughly mixed to prevent crunchy spots. While the recipe calls for a significant amount of butter, you can reduce it without compromising the core flavor profile, though a good pat of butter does contribute to a rich, golden top crust. Avoid overbaking; the chicken should be cooked through and the rice tender, but not dry.