Preheat the oven to 350°F
Slice 4 to 5 cups of yellow squash
Boil or steam the squash until tender
Drain the squash well
Mash or lightly mash the squash
Melt 2 tablespoons of butter in a skillet
Sauté 1 small chopped onion until soft
Mix the squash, onion, 1 beaten egg, 1 cup shredded cheese, salt, and pepper
Stir in 1 cup crushed crackers or breadcrumbs
Transfer the mixture to a greased baking dish
Top with extra crushed crackers and a few dots of butter
Bake for 25 to 30 minutes until golden and set
Let it rest a few minutes before serving