Preheat the oven 400 degrees.
Cook the broccoli as directed on package and drain.
Combine the soup, eggs, mayonnaise, onion, and cheese, and then season with salt and pepper to taste.
Stir in the broccoli. Spray a casserole dish with nonstick spray and add broccoli mixture. Top with the crushed Cheez-Its and bake for 25-30 minutes, until the mixture is bubbling and the Cheez-Its are lightly golden.