I am going to use fresh spinach because I have a lot of it. Other than squeezing liquid out, is there anything else I need to know? Thanks in a...

What to look for to tell they're done? They should have a crispy outside.

On the matter of baking them from frozen, I heat the oven, then put them in, and figure at least 10 extra minutes of baking time after the original baking time in the recipe. I test by tasting one. When they're hot in the center, they're done.

I've used fresh spinach, too. Just steam the spinach and then squeeze out the excess water. It will work just fine.