Just made this about an hour ago and doubled the recipe (made A LOT). It's very delicious. My dad said I ruined a perfectly good bag of shrimp because I added spinach, but I love it.
I used can tomatoes though and should have drained them b/c it was too watery. I also put in more tomatoes and spinach then the recipe calls for, and I added a whole cup of parmesan to the top and baked it like a caserole when done, then broiled the top to make the parm a little crunchy.
Mmmmm. And it's still only 333 calories for a 12/th of the pan even with the cheese (which is filled to the top AND larger than 13x9), so it's a big portion (I ate 1/8th ... only 500 calories and a HEAPING bowl full with TONS of shimp! ... way too much food, I'm actually stuffed.)
Also, I used onion instead of shallots and cayenne pepper, black pepper, oregeno, paprika and salt because I had no cayenne pepper on hand.
Definitely going to add this to my recipe list for the future, but will probably try to make it less watery or more of a thick casserole next time.
EDIT: Actually once it cooled it wasn't very watery at all ... even better as seconds!