It costs about 75 cents for a box the size of two decks of cards. I thaw it by running it under hot water, break it into chunks about the size of two tablespoons, and freeze each chunk in a 6x3-inch plastic bag.
Then I can pull out a bag, thaw it, and put the spinach in scrambled eggs while they are cooking ... making a fritatta! By the time I add a ton of cheese, you can't taste the spinach anyway.
I have also added spinach, plus the juice of half a lemon, to Cambell's chicken soup for an instant Greek chicken soup.
You can also put it on pizza (I haven't done that yet) and sneak it into spaghetti sauce (guilty).