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Cook the noodles; drain and set aside.
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Brown the meat; drain. Add the tomato sauce to the beef; remove from heat.
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In a separate bowl, mix the cream cheese, cottage cheese, sour cream, onions, and peppers.
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Butter a casserole dish and spread 1/2 the noodles in the bottom.
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Cover the noodles with 1/2 of the cheese mixture, then 1/2 of the meat mixture, then 1 more layer of noodles, then cheese mixture and then meat mixture.
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Pour 2 tablespoons of butter over the top; press down slightly.
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Bake at 375° for 1 hour to 1 hour 15 minutes.
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If drier casserole is desired, cook 15 minutes longer.