Step 1

Preheat oven to 350 degrees.

Step 2

Melt butter in skillet.  Add squash, onion, and garlic salt.

Step 3

Saute' for 10 minutes over medium heat until tender.  Take off heat.

Step 4

Add sour cream, mayonnaise, cheddar and parmesan to the skillet. Stir well.

Step 5

Beat 2 eggs and mix well with filling.

Step 6

Pour contents of skillet into a large casserole dish.

Step 7

In a separate bowl, melt butter in microwave.

Step 8

Crush crackers and french fried onions in a large baggie and mix with melted butter in bowl.

Step 9

Sprinkle cracker mixture over squash casserole.

Step 10

Bake for 30 minutes until topping is golden brown.