Ensure your oven rack is set in the middle and preheat your oven to 350F. Prep a 9x13 casserole dish with non-stick spray and set aside.
Place all ingredients (except the ritz and butter) into a large bowl and mix until well combined. Then transfer to your prepared casserole dish.
In a small bowl, add crushed Ritz crackers with melted butter and mix well. Sprinkle the topping all over the casserole dish and bake for 25 minutes until the top is lightly golden.
Allow it to cool slightly, then garnish with fresh parsley and serve warm.
Notes
We shredded 2 pounds of boneless skinless chicken breasts for this recipe. You can use leftovers or pre-cook your chicken before beginning. Or, opt for a rotisserie chicken from the grocery store, but do note that the flavor might differ slightly.
Canned chicken will also work if that's what you prefer or what you have on hand. Drain the chicken well before incorporating with the other ingredients.
Feel free to add vegetables to the mix such as 1-2 cups of frozen peas or bite-sized chopped broccoli.