Preheat oven to 350 Grease 9 x 12 baking pan Brown onions and garlic in oil Add box of thawed spinach cook until all soft Transfer to bowl Add eggs breadcrumbs and Cheddar cheese mix well Pour into pan sprayed with Pam and sprinkle with Parmesan cheese Cover and bake 20 minutes Uncover bake another 20 minutes until golden brown Cool slightly and cut into squares