This is one of my mama’s faves! Perfect for summertime!

2 pounds yellow squash, sliced
1 medium onion, chopped
1 cup shredded cheddar cheese
1 cup crushed Ritz crackers
1/2 cup mayonnaise
2 large eggs, beaten
1/4 cup butter, melted
1 teaspoon salt
1/2 teaspoon black pepper