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Preheat the oven to 190°C/375°F/Gas mark 5.
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To make
the meat sauce, cook the onion and garlic gently in
the olive oil until tender, without browning. Add
the lamb and stir until it loses its raw look. Now
add all the remaining meat sauce ingredients except
the parsley and season with salt and pepper. Simmer
for 20 to 30 minutes until thick. Stir in the
parsley.
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Next make the white sauce. Melt the
butter and stir in the flour. Keep stirring for
about 1 minute. Take the pan off the heat and add
the milk gradually, stirring well. Return to a
gentle heat and let it simmer for 10 to 15 minutes,
stirring frequently, until it is fairly thick.
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Remove from the heat and stir in the cheese and salt
and pepper. Just before using, beat the whole egg
and yolk into the sauce.
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Sprinkle the slices of aubergine with salt and leave for at least 30
minutes. Wipe clean and lay them on oiled baking
sheets. Brush generously with olive oil and bake in
the oven for about 20 minutes until tender and
patched with brown.
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Brush a rectangular baking dish lightly with oil.
Lay half the aubergine slices on the base,
overlapping if necessary, then spread half the meat
sauce on top.
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Repeat these layers, then spoon over
the white sauce, covering the meat entirely.
Sprinkle the grated cheese and the cinnamon over the
top. Bake at 180°C/350°F/Gas mark 4 for 50 to 60
minutes until nicely browned. Let it settle for 5
minutes before serving.