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1
Make the caramel: Combine 1/4 cup water with the fish sauce in a glass measuring cup and set aside.
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2
If using granulated sugar, put it in a heavy-based skillet just large enough to hold the scallops in a single layer.
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3
Pour over the remaining 1/4 cup water and let it sit for a minute to soak in.
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4
Heat the skillet over medium heat until the sugar liquefies.
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5
You can shake or swirl the pan or stir with a wooden spoon once or twice so the sugar melts evenly, but dont stir constantly.
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6
Once the contents of the saucepan have liquefied entirely (the sugar will be clear with faint traces of amber around the edges), dont stir at all, or you risk crystallizing the sugar.
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7
If the sugar appears to be boiling unevenly, swirl the pan a little to even it out, but avoid disturbing it or swirling it too frequently.
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8
The sugar will begin to caramelize and darken quickly, so stay close by to monitor its progress.
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9
Continue to boil until the caramel is a deep reddish brown, but not black, 8 to 10 minutes.
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10
When the caramel begins to smoke a bit around the edges and smells very toasty, it is ready.
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11
Youre after a very dark caramelone that is very nearly burnt.
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12
If youve only ever made caramel for desserts, dont be afraid to take this one further.
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13
(Since this is such a shallow amount of caramel, Ive never had any success using a candy thermometer for this dish.
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If you want to try, aim for a temperature in the range of 370 to 375 degrees.)
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15
If using Chinese slab sugar, combine it with 2 tablespoons water in the skillet over medium heat.
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Heat, stirring frequently with a wooden spoon to break up the sugar, until the sugar dissolves, about 4 minutes.
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Slab sugar eliminates the fear of having the sugar seize and crystallize, so theres no concern of overstirring.
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Reduce the heat to medium-low, and let the caramel bubble, stirring frequently, until it becomes a deep reddish brown, but not mahogany or black, 3 to 4 minutes.
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19
Adding the water and fish sauce: Standing back and pouring slowly so the caramel does not boil over, add the water and fish sauce mixture.
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20
Dont worry if the caramel hardens; it will melt again as it boils.
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21
Stir and let the caramel boil until you have a smooth, thick sauce, about 4 minutes.
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22
Add the shallots, reduce the heat to low, and simmer for 2 minutes.
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Set the pan aside.
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24
(You can make the caramel sauce ahead and keep it refrigerated in a jar for weeks.)
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25
Trimming the scallops: Examine the scallops.
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26
Most come with an opaque squareish hard bit attached to one side.
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This is a muscle that attaches the scallop to the shell and while not inedible, it is neither sweet nor tender and is best removed.
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Do so by taking hold of this little muscle with one hand and pulling: it will strip off easily.
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29
Braising the scallops: Bring the caramel sauce back to a very low simmer over medium-low heat in the same skillet you made it.
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30
Stir in the red pepper flakes and the white part of the scallions.
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31
Add the scallops in a single layer, partially cover, and simmer very gently for 4 or 5 minutes.
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32
Gently turn the scallops, using a small spatula or a pair of tongs, and continue to simmer until just cooked through, another 3 to 5 minutes.
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33
If unsure, nick a single scallop with a sharp thin-bladed knife and peek to check that there is just the slightest bit of translucence in the center.
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Serving: Transfer the scallops to warm plates and spoon over some of the sauce.
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35
Garnish with the scallion greens and serve immediately.
