Mix spinach, cheese, eggs and spices.

Spread two tablespoons of the mixture over each lasagna noodle and roll up. Place each roll-up in a nine- by 13-inch baking pan.

Melt butter in a small pot. Add flour and brown for two minutes.

Slowly add milk and salt and cook until hot.

Immediately pour the sauce over the roll-ups. Bake at 350 degrees Fahrenheit for one hour.