From Bakespace.com

2 Cups Cooked Yellow Squash
1 Medium Onion
1 Rib Celery
1 Can Cream of Chicken Soup
1 Tbsp Butter
2 Cups Sharp Cheddar Cheese, Grated
1 Egg
1 Pkg. Ritz Crackers, Crushed
Salt and Pepper to Taste

Drain and mash cooked squash. In a saucepan, saute onion and celery till tender, add to squash. Combine all other ingredients with squash mixture, reserving 1/2 cup cheese.

Place in a greased casserole dish and back for 40 min. in a preheated 400 degree oven. Top with remaining cheese during last 10 minutes of baking. Remove and let set for 5 minutes. Serve and enjoy!