Spinach Lasagna

16 oz ricotta cheese, part skim
1 1/2 cups mozzarella cheese, shredded
1 egg, slightly beaten
1 (10 oz) package frozen spinach, thawed and well drained
1 tsp salt
3/4 tsp oregano
1/4 tsp basil
4 cups spaghetti sauce (or more if you like lots of sauce)
9 no-boil lasagna noodles
3/4 cup water

Preheat oven to 350F

Grease 8 x 11 baking dish ( can use a 9 x 13 inch but I don't think it firms up as much when that is used).

In a large bowl, mix together the ricotta, 1 cup of mozzarella, egg, spinach, salt, oregano and basil. Spread 1/2 cup of the spaghetti sauce in the bottom of the prepared pan. Spread 1/3 of the cheese mixture on 3 of the lasagna noodles. Place side by side, cheese side up, over the sauce in the pan. Spread about 1 to 1 1/3 cup sauce over the noodles. Make 2 more layers of noodles and sauce. Pour water around the edges.
Cover tightly with aluminum foil and bake for 40 - 45 minutes. Top with remaining cheese and back uncovered an additional 5 minutes or until cheese is melted.
Let stand at room temperature for 15 minutes to firm up before serving.

Serving size -1/8 of casserole

To make a meat version - omit the spinach and add 1 lb browned ground beef or Italian sausage to the spaghetti sauce after the 1/2 cup is spread in the bottom of the baking dish.