If you love spinach, you'll love this tart. This recipe doesn't call for a crust, but I have made it using a store bought crust and it worked well. The fat and calories are obviously less if you don't use a pie crust. For a little extra "something", when the tart is finished, sprinkle a little shredded Mozzarella cheese or shredded Parmesan over top and put it back in the oven for 5 minutes to melt the cheese over the top. When it's done, then arrange your tomato slices on top of the cheese and serve.