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1
For the nests: Heat about 4 inches of vegetable oil to 340 degrees F in a 4-quart saucepan.
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2
(Use a saucepan that is taller than it is wide.)
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3
Line a baking sheet with paper towels.
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4
While the oil is heating, halve and rinse the leeks.
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5
Slice them thinly and put in a medium bowl.
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6
Peel the potatoes and use a mandoline to julienne them.
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7
(To julienne without a mandoline, slice the potatoes about 1/8 inch thick, stack the slices, and slice 1/8-inch thick.)
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8
Toss the potatoes, butter, flour, salt and pepper with the leeks.
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9
Scoop about 1 cup of the potato mixture into a bird's next frying basket and immerse in the hot oil until set and golden brown.
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10
Transfer to the paper towels and repeat with the remaining mixture.
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11
For the lobster salad: Combine the mayonnaise, mustard, lemon zest and juice, cayenne pepper, chives and tarragon in a large bowl.
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12
Season with salt and pepper.
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13
Gently fold in lobster, fennel and celery.
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14
Taste and season with more salt and pepper, if necessary
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15
To serve, place a potato and leek nest in the centers of 4 plates.
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16
Mound a small bunch of frisee in the middle of the nests, and then top with some the lobster salad.
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17
Garnish with chives and caviar.