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1
Whisk together the sesame oil, 2 tablespoons of the canola oil, and the orange zest in a medium bowl. Add the scallops and let marinate in the refrigerator for at least 15 minutes and up to 30 minutes.
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2
Heat the remaining 2 tablespoons canola oil in a medium saucepan over medium heat. Add the ginger and red chile flakes and cook until the ginger is salt, about 2 minutes. Increase the heat to high, add the orange juice, lime juice, brown sugar, and soy sauce, and simmer, stirring occasionally, until the mixture is reduced by half, 8 to 10 minutes. Remove from the heat, stir in the rice vinegar, and let cool to room temperature. The sauce can be made 8 hours in advance, covered, and refrigerated. Bring to room temperature before serving.
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3
Bring a large pot of salted water to a boil over high heat. Add the noodles and cook until al dente, 3 to 4 minutes. Drain, rinse with cold water, and drain again. Transfer to a platter and toss with half of the citrus-ginger sauce.
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4
Heat your grill to high.
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5
Season the scallops on both sides with salt and pepper. Place the scallops on the grill and grill until golden brown and slightly charred, about 3 minutes. Turn over and continue cooking for about 3 minutes longer until just cooked through.
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6
Place the scallops on top of the noodles and drizzle with the remaining citrus-ginger sauce. Garnish with green onions and sesame seeds.