Let broccoli and cauliflower defrost overnight in the fridge. Thaw spinach on the counter so it’s room temp.

Preheat oven to 375 degrees Fahrenheit and spray a 9×13-inch pan with cooking spray.

Place spinach in a mesh strainer and squeeze to remove as much liquid as possible.

Place broccoli, cauliflower, and drained spinach in a large bowl. Add parve milk, eggs, mayo, and spices, and mix very well until all ingredients are combined. Pour mixture into prepared pan and smooth out so it’s evenly distributed.

Bake in preheated oven for one hour and 30 minutes. When cool, cut into two-inch squares. Serve hot or at room temp.