I got this in an email from Campbell's today. I checked to see if it was already on here, and found several that are different than this one, so here it is. I am going to try it soon. Sounds delicious.
Stir the soup and milk in a small bowl until smooth. Stir the egg and ricotta in a medium bowl.
Spread 1 cup soup mixture in a 3-quart shallow baking dish. Top with 3 uncooked lasagna noodles, ricotta mixture, spinach, chicken, 1 cup Cheddar cheese and 1 cup soup mixture. Top with remaining uncooked lasagna noodles and remaining soup mixture. Cover the baking dish.
Bake at 375°F for 1 hour or until the lasagna is hot. Uncover the baking dish. Top with the remaining Cheddar cheese. Let stand for 10 minutes.
Tip: To thaw the spinach, microwave on HIGH for 3 minutes, breaking the spinach apart with a fork halfway through heating.