Summer Squash Casserole Recipe

Ingredients

• 2 small yellow summer squash, sliced
• 1/4 onion, chopped
• 1/2 teaspoon salt, divided
• 1 egg
• 1/4 mayonnaise*
• 2 teaspoons sugar
• pepper to taste
• 1/4 shredded Cheddar cheese
• 2 tablespoons cornflakes, crushed
• 1 1/2 teaspoons butter, melted