Instructions: Preheat oven to 350F. Cook noodles according to directions. Drain, transfer to pan of cold water. Add 2 T. olive oil to prevent sticking. (I added this while cooking.) Combine remaining ingredients (except marinara sauce and reserved cheese) in medium bowl and mix well. Pour 2 cups marinara sauce in a 9x13 pan (or glass). Pat excess water from shells, fill with cheese, spinich mixture and lay in pan. Pour remaining sauce over shells and sprinkle with reserved cheese. Bake 15-20 minutes uncovered. (Note: I omitted egg and salt but increased Ricotta cheese to 2 cups and Mozzarella cheese to 2 cups in bowl - needed to fill 12 shells.

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