Best Baked Spaghetti

Similar to baked ziti but has a lot more cheese.
I like this because the oven does the work.
Everybody likes this because of all the cheese.

Ingredients:
1 package (16 ounces) spaghetti
1 pound ground beef
1 medium onion, chopped
1 jar (26 ounces) pasta sauce
1/2 teaspoon seasoned salt
2 eggs
1/3 cup grated Parmesan cheese
5 tablespoons butter, melted
2 cups (16 ounces) 4% cottage cheese
4 cups (16 ounces) part-skim shredded mozzarella cheese

Directions:
Cook spaghetti according to package directions.
Meanwhile, in a large skillet,
cook beef and onion over medium heat
until meat is no longer pink; drain.
Stir in pasta sauce and seasoned salt; set aside.
In a large bowl, whisk the eggs,
Parmesan cheese and butter.
Drain spaghetti,
add to egg mixture and toss to coat.
Place half of the spaghetti mixture
in a greased 13-in. x 9-in. baking dish.
Top with half of the cottage cheese,
meat sauce and mozzarella cheese. Repeat layers.
Cover and bake at 350° for 40 minutes.
Uncover; bake 20-25 minutes longer
or until cheese is melted.