Aunt Ann's Traditional Lasagna

This recipe comes from my friend Rob, who got it from Tina, who got it from her Aunt Ann (hence the title). Although I haven't made it myself yet, I HAVE tasted it when Rob made it (he even made a special version for me that had little cheese because I'm not a big fan of cheese) and it was so delicious! The sauce is simply amazing.... I know you'll enjoy this one.
 
INGREDIENTS

For the sauce:
1 lb. lean ground beef
3/4 lb. bulk sausage
24-oz. canned tomato sauce
12-oz. canned tomato paste
2 garlic cloves, minced
2 tsp. sugar
1 tsp. Italian seasoning
1 tsp. salt
1/2 tsp. black pepper

For the filling:
3 eggs
3 Tbsp. fresh parsley, minced
24-oz. cottage cheese
8-oz. ricotta cheese
1/2 c. grated Parmesan

For final assembly:
9 lasagna noodles, cooked and drained
6 slices provolone cheese
3 c. mozzarella cheese, shredded, divided

In a skillet, cook the meat until brown. Add remaining sauce ingredients. Simmer, uncovered, for one hour.
In a bowl, combine the filling ingredients.
To assemble, spread 1 cup of meat sauce in an ungreased 13x9x2-in. baking dish.
Layer: 3 noodles, provolone cheese, 2 cups filling mixture, 1 cup mozzarella
            3 noodles, 2 cups meat sauce, remaining filling, 1 cup mozzarella
            Top with remaining noodles, meat sauce and mozzarella
Cover and bake at 375 degrees for 50 minutes. Uncover and bake 20 minutes longer. Let stand 15 minutes before cutting.