This recipe is from the " Martha Stewart's Dinner at Home" cookbook.
In a medium bowl, whisk together curry powder, mustard, and vinegar. Season with salt and pepper. While whisking, slowly drizzle in 3 tablespoons oil; whisk until emulsified. Set aside.
Place couscous in a large bowl. Bring 1 cup water to a boil; pour over couscous; stir to combine. Cover with a plate; let steam until water is absorbed, about 5 minutes. Fluff with a fork; set aside.
Heat remaining tablespoon oil in a large skillet over medium heat. Add onion, and cook, stirring, until softened, about 4 minutes. Stir in garlic and chile; cook, stirring, until softened, about 2 minutes. Add corn, and cook until bright yellow and just tender, about 2 minutes. Stir corn mixture into couscous. Add curry vinaigrette and cilantro; toss to combine. Serve warm or at room temperature.