Cook onion in butter until translucent.

Add grated squash and cook until softened, about 5 minute.

Drain squash of excess moisture.

In a large bowl, add the eggs, half and half, and seasonings. Whisk well.

Temper in the squash, then add the rest of the squash plus the stovetop stuffing mix. Mix well.

Mix in the shredded Velveeta cheese.

Pour into a prepared 13x9 casserole dish. Top with buttered crushed crackers. Bake at 350 for 25 minute.