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Preheat the oven to 375°F and set aside a greased 9”x13” baking dish.
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Heat the oil in a saucepan over medium-high heat. Cook the ground beef with salt, black pepper, and red pepper flakes until the meat is no longer rare. Mix in the spaghetti sauce and remove from heat.
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Mix the cottage cheese, egg, and parmesan cheese and set aside.
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Add a few spoons of the spaghetti sauce to the baking dish, making sure the bottom of the pan is coated. Place three lasagna noodles side-by-side over the sauce. Add a third of the cottage cheese mixture over the noodles, followed by a third of the spaghetti sauce, which is followed by sprinkling one cup of the mozzarella cheese. Follow this layering process two more times, ending with a final layer of mozzarella cheese.
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Bake covered for 40 minutes; uncover and bake for an additional 15 minutes; and lastly, broil for 5 minutes until the top is brown and bubbly. Let the lasagna rest for ten minutes before serving.