Heat the oven: Preheat to 350°F. Spray a 9 x 13-inch baking dish with cooking spray and set aside.
Stir together the filling: In a large bowl, combine the chicken, rice, mayonnaise, condensed soup, chicken broth, onion, celery, and almonds (see the notes below if you prefer more tender veggies). Taste and season with salt and pepper.
Transfer to the dish: Spread the filling into the prepared baking dish in an even layer.
Butter the crumbs: In a separate bowl, stir together the crushed Ritz crackers and melted butter until the crumbs are evenly coated.
Top the casserole: Sprinkle the buttered crumbs over the filling.
Bake: Bake uncovered until hot, bubbly, and golden brown on top, about 25 to 30 minutes.
Rest and serve: Let stand about 5 minutes, then garnish with fresh parsley if you like.