Preheat oven to 350°F.
In a large saucepan, combine ground beef, onion and garlic. Cook over medium heat stirring often, until onions are soft and no pink remains in beef. Discard excess fat; stir in red pepper flakes and pasta sauce. Bring to a boil, reduce heat and simmer uncovered for 30 minutes, stirring occasionally.
Stir together ricotta, parmesan, eggs, parsley, salt and pepper in a small mixing bowl.
Spray a 9 x 13 casserole dish with non-stick spray. Spread one-third of beef sauce evenly on bottom, cover with single layer of 3 noodles, half of ricotta mixture, one-third beef sauce, 2 cups shredded cheese, 3 noodles, remaining ricotta mixture, beef sauce, noodles and cheese.
Cover a sheet tray with foil. Place casserole on sheet tray and bake for 30 minutes. Turn, remove foil and bake an additional 20-25 minutes until golden and bubbly. Recipe and Image Courtesy of Certified Angus Beef ® brand.