* If you prefer not to use olive oil, you can use ¼ cup of water for each batch of spinach. Add to the pan after you’ve added the spinach. Add more if needed.
* You can use 1-1/2 cups of frozen spinach (thawed and squeezed to remove liquid) in place of fresh spinach. You do not need to cook it.
* You can prepare the dip 24 hours in advance up until the baking step. Cover and refrigerate until ready to bake. Add 10 extra minutes to baking time (30 to 35 minutes).