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1
Cut eggplant lengthwise into 1/3-inch-thick slices and sprinkle slices on both sides with salt.
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2
Arrange eggplant in a large colander and weight it with a heavy bowl.
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3
Drain eggplant 1 hour.
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4
Remove bowl and pat eggplant dry.
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5
Set broiler rack so that eggplant will be about 4 inches from heat and preheat broiler.
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6
Arrange eggplant in one layer in oiled shallow baking pans and brush with oil.
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7
Broil eggplant until golden, about 3 minutes on each side.
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8
In a large heavy non-stick skillet cook onions and garlic in oil over moderate heat, stirring, until softened.
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9
Add lamb and cook, stirring to break up, until it is no longer pink, about 3 minutes.
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10
Stir in remaining meat sauce ingredients and salt and pepper to taste and simmer, uncovered, 30 minutes.
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11
Meat sauce may be made 3 days ahead, cooled completely, and chilled, covered.
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12
In a heavy saucepan melt butter over moderately low heat and whisk in flour until smooth.
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13
Cook roux, whisking, 3 minutes.
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14
Whisk in milk in a stream and salt and pepper to taste and simmer, whisking occasionally, 5 minutes, or until thick.
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15
Whisk in egg, whisking vigorously, and simmer sauce, whisking, 1 minute.
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16
White sauce may be made 2 days ahead and chilled, its surface covered with plastic wrap.
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17
Preheat oven to 375F.
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18
Pour 1 cup meat sauce into a flame-proof baking dish, 13 by 9 by 2 inches (sauce will not cover bottom completely), and cover with 3 lasagne sheets, making sure they do not touch each other.
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19
Spread about 1 1/2 cups meat sauce over pasta and arrange 1 layer broiled eggplant on top.
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20
Gently spread about 1/2 cup white sauce over eggplant and sprinkle with about 1/3 cup feta.
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21
Make 2 more layers in same manner, beginning and ending with pasta.
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22
Spread remaining white sauce evenly over top pasta layer, making sure pasta is completely covered, and sprinkle with remaining feta.
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23
Cover dish tightly with foil, tenting slightly to prevent foil from touching top layer, and bake in middle of oven 30 minutes.
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24
Remove foil and bake lasagne 10 minutes more, or until top is bubbling.
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25
Set broiler rack so that lasagne will be about 4 inches from heat and preheat broiler.
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26
Broil lasagna 1 to 2 minutes, or until golden.
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27
Let lasagne stand 5 minutes before serving.