Cheesy Rigatoni Bake

This is a wonderful recipe:
http://www.kitchenmonki.com/recipe/Cheesy_Rigatoni_Bake

Ingredients:
16 ounces Rigatoni Pasta
2 tablespoons Butter
1⁄4 cup Flour
1⁄2 teaspoon Salt
2 cups Milk
1⁄4 cup Water
4 Eggs, lightly beaten
2 cans Tomato Sauce, 8 oz. each
2 cups Shredded Partly Skimmed Mozzarella Cheese,
8 oz 1⁄4 cup Grated Parmesan Cheese

Cook pasta according to package directions. Meanwhile, in a small saucepan, melt butter. Stir in flour and salt until smooth; gradually add milk and water. Bring to a boil; cook and stir for 2 minutes or until thickened.

Drain pasta; place in a large bowl. Add eggs. Spoon into greased 13x9 baking dish. Layer with tomato sauce, mozzarella cheese and the white sauce. Sprinkle with parmesan cheese.

Bake, uncovered, at 375 for 30-35 minutes.