Spinach Lasagna - cooking recipe

Ingredients

1 (32 ounce) jar spaghetti sauce
1 (12 ounce) can tomato paste
1 tablespoon sugar
1 (16 ounce) container ricotta cheese
1 cup sour cream
2 eggs, beaten slightly
1/2 cup shredded parmesan cheese
4 cups shredded mozzarella cheese
8 -10 uncooked lasagna noodles
1 (10 ounce) package frozen chopped spinach, thawed and drained well.

Preparation

Mix together the spaghetti sauce, tomato paste and sugar.
In a seperate bowl, mix together the ricotta cheese, sour cream, eggs, spinach and Parmesan cheese.
In a greased 9 x 13\" casserole, layer in the following order: 1/3 of the spaghetti sauce, a layer of lasagna noodles, 1/2 the spinach-cheese mixture, 1/3 of the mozzarella cheese.
Repeat.
Finish with remaining 1/3 of the spaghetti sauce and remaining mozzarella cheese.
Cover tightly with foil.
Bake 1 hour at 350\u00b0.
Uncover and continue cooking for 15 minutes longer.
Remove from oven and let it set for 15 minutes before serving.