Preheat your oven to the specified temperature as per the recipe. Grease or prepare a baking dish suitable for the casserole.

Boil the six generous cups of sliced yellow squash in water until tender, then drain thoroughly.

In a large mixing bowl, combine the cooked squash, crushed Ritz crackers from two packets, shredded sharp cheddar cheese (two cups), thoroughly beaten large eggs (four), finely chopped onion (one full cup), creamy milk (one and a half cups), perfectly melted butter (half a cup), and salt and pepper tailored to your taste preferences. Mix these ingredients until well combined.

Transfer the combined mixture into the prepared baking dish, spreading it evenly.

Place the casserole dish into the preheated oven and bake for the specified time provided in the recipe or until the casserole sets and the top turns golden brown.

Once baked, remove the casserole from the oven and let it cool slightly before serving. Serve this delightful Brenda Gantt Squash Casserole as a comforting and flavorful dish for any meal!