Corn and Squash Pudding

Ingredients

• Nonstick cooking spray, for greasing
• 1 tablespoon unsalted butter
• 2 cloves garlic, minced
• 1 onion, chopped
• One 10-ounce box frozen cooked winter squash, thawed and drained
• One 10-ounce box frozen whole kernel corn, thawed
• 1 1/2 cups 2-percent milk
• 1/3 cup cornmeal
• 1/4 cup chopped fresh parsley
• 1/4 teaspoon freshly grated nutmeg
• Pinch cayenne pepper
• Kosher salt and freshly ground black pepper
• 3 large egg whites
• 2 cups cornflake cereal