Preheat oven to 350°F. Cook lasagna noodles according to package directions and drain.
Brown ground beef in a large skillet over medium heat, breaking it up as it cooks.
Add green pepper, onion, sugar, garlic salt, oregano, and pepper to the beef. Stir in tomato sauce.
Simmer the meat sauce uncovered for 20 minutes, stirring occasionally.
In a bowl, combine cottage cheese, parmesan cheese, egg, parsley flakes, and pepper. Mix well.
To assemble lasagna: Start with a layer of noodles in a greased 9x13 inch baking dish.
Spread half of the meat sauce over the noodles.
Layer the entire cheese mixture over the meat sauce.
Add another layer of noodles.
Top with remaining meat sauce and sprinkle mozzarella cheese evenly over the top.
Bake uncovered for 45-55 minutes or until golden brown and bubbly.
Let sit for 10 minutes before cutting to allow layers to set.