Lentil Lasagna

Ingredients
9 lasagna noodles
1 pkg. frozen spinach
1 lb. cottage cheese
1/2 c. dry lentils
1 c. grated cheddar
1 c. grated mozzarella
1/2 c. Parmesan
large jar of spaghetti sauce (I use Prego or Classico)
Instructions
Cook lentils in boiling water for about 20 minutes, drain.
Thaw spinach in microwave, press out liquid. Cook noodles al dente.
Make layers in oblong baking pan as follows: sauce, noodles, sauce,
cottage cheese, lentils, spinach, cheddar & mozzarella, more sauce.
Cover top layer of noodles with sauce, sprinkle with Parmesan.
Bake at 375F for 30-35 minutes. Add 1/2 lb. sliced sauteed mushrooms
to sauce if desired. For variation use black beans instead of lentils.