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1
Grease a 2-quart casserole or a 2-quart square baking dish; set aside.
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2
Cook noodles according to package directions; drain and set aside.
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3
In a medium mixing bowl beat together the sour cream and cream cheese with an electric mixer on medium speed until smooth.
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4
Stir in milk and onion.
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5
Meanwhile, in a large skillet cook beef until brown.
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6
Drain off fat.
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7
Stir tomato sauce, basil, sugar, garlic powder, salt, and pepper into skillet.
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8
Bring to boiling; reduce heat.
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9
Simmer, uncovered, for 5 minutes.
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10
Preheat oven to 350F.
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11
In prepared casserole or baking dish, layer half of the noodles (about 2 cups), half of the meat mixture (about 1 1/2 cups), half of the cream cheese mixture (about 1 cup), and all of the spinach.
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12
Top with the remaining meat mixture and noodles.
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13
Cover and chill remaining cream cheese mixture until needed.
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14
Cover casserole or baking dish with lightly greased foil.
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15
Bake in 350F oven about 45 minutes or until heated through.
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16
Uncover; spread with remaining cream cheese mixture.
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17
Sprinkle with the cheddar cheese.
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18
Bake, uncovered, about 10 minutes more or until cheese is melted.
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19
Let stand for 10 minutes before serving.