Creating the Crispy Chicken Salad Casserole is a straightforward process. Follow these simple steps:

1. Preheat Oven: Preheat your oven to 350°F (175°C).
2. Prepare Chicken: If you haven’t already, cook and chop or shred 3 cups of chicken.
3. Mix Ingredients: In a large mixing bowl, combine the cooked chicken, celery, green onions, and salad greens.
4. Add Creamy Components: Stir in the cream of chicken soup, sour cream, lemon juice, garlic powder, onion powder, salt, and pepper. Mix until well combined.
5. Transfer to Baking Dish: Pour the mixture into a greased 9×13-inch baking dish and spread it evenly.
6. Add Cheese: Sprinkle the cheese evenly over the top of the casserole mixture.
7. Prepare Topping: In a separate bowl, mix the crushed buttery crackers with melted butter until well coated.
8. Top Casserole: Spread the cracker mixture evenly over the cheese layer.
9. Bake: Place the casserole in the preheated oven and bake for 30-35 minutes or until bubbly and golden brown.
10. Cool: Once done, remove from the oven and let it cool for a few minutes before serving.

These straightforward steps will ensure you create an incredible Crispy Chicken Salad Casserole that everyone will enjoy!