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In a large skillet over medium heat, cook beef until brown. Drain. In another skillet over medium heat, cook onion until translucent. Combine beef and onion in a large saucepan with tomato paste, crushed tomatoes, water, oregano, garlic powder, salt, pepper and sugar. Cook over medium heat until mixture comes to a boil. Reduce heat to low and simmer 1 hour. While sauce is simmering, blend cottage cheese, Parmesan and egg until smooth. Set aside.
Bring a large pot of lightly salted water to a boil. Add pasta and cook for 8 to 10 minutes or until al dente; drain.
Preheat oven to 350 degrees. Spread 1 cup of sauce in the bottom of a 9x13 inch baking dish. Cover sauce with 3 noodles. Cover noodles with one-third of remaining sauce. Top with half the mozzarella. Place another layer of noodles and one of sauce over the mozzarella; top that with the cottage cheese mixture. Top with remaining 3 noodles and remaining sauce. Bake in preheated oven 30 minutes. Sprinkle remaining mozzarella on top and bake 15 minutes more, until golden and bubbly.
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