Dinner Tonight: Sliced Steak With Roasted Corn Salsa

Name: Dinner Tonight: Sliced Steak With Roasted Corn Salsa
Ingredients: 3 cups fresh corn (about 3 ears); 4 scallions, white and green parts thinly sliced and separated; 2 tablespoons (1/4 stick) unsalted butter; 2 medium cloves garlic, minced or grated on microplane grater (about 2 teaspoons); 1 1/2 teaspoons kosher salt; 1 1/2 teaspoons whole cumin seeds, toasted and groung; 1 teaspoon chili powder; 1/2 teaspoon freshly ground black pepper; 2 tomatoes, stems removed and finely chopped; 1 jalapeño, stemmed and finely chopped; 1 tablespoon canola oil; Four 1/2-pound top sirloin steaks (about 1 1/2 inches thick); 1/4 cup fresh cilantro, chopped; 2 limes