Spinach Lasagna

1 pound fresh spinach
2 tablespoons vegetable oil
1 medium onion, chopped
2 cloves garlic, minced
2 teaspoons oregano leaves
1/2 teaspoon basil
3/4 teaspoon thyme
3 (16 ounce) cans tomatoes, drained
1/2 pound whole wheat lasagna noodles
1 1/4 pounds mozzarella cheese, sliced thin
1 pound ricotta cheese
Parmesan cheese, grated

Rinse spinach leaves individually and place them in a saucepan. Cover and cook over medium heat, with just the water clinging to the leaves, until the spinach is steaming and wilted (about 2 minutes). In another saucepan, heat vegetable oil and saute onion, garlic, oregano and basil until onion is soft. Stir in thyme and tomatoes. Cover and cook 20 to 30 minutes. Cook lasagna noodles for 10 minutes in a large kettle of boiling water to which 1 tablespoon oil has been added.

Oil a 13 x 9-inch baking pan and pour in enough of the tomato sauce to cover the bottom. Add layers in the following order: noodles, spinach, ricotta, mozzarella, Parmesan and tomato sauce. Repeat until all ingredients are incorporated. Bake at 350 degrees F for 35 to 45 minutes, or until the cheeses are melted and the sauce bubbles. Remove from the oven and let stand 15 minutes before cutting in squares and serving.