Oh my, this is a fantastic dish! I found the recipe this morning and prepared it for lunch today and this quiche is both attractive and tasty! It's also low in carbs since it has no crust and no high carb ingredients.
I changed the recipe just a tad, using fewer eggs because I used less spinach, and I added garlic, chicken bouillon, crushed red pepper and about a Tablespoon of half and half. I also used a combination of mozzarella, sharp cheddar, and asiago cheeses. Next time I prepare it I'll add some cooked turkey bacon or turkey ham and see how that tastes.
Leftovers are definitely going in my lunch box today!