Seared Spicy Fajitas

Name: Seared Spicy Fajitas
Ingredients: 1 teaspoon ground cumin; 1/2 teaspoon ground coriander; coarse salt and ground pepper; 1 pound skirt steak, cut crosswise into 2 equal pieces (if too large for skillet, cut into smaller pieces); 2 red bell peppers (ribs and seeds removed), halved and thinly sliced; 1 red onion, halved and thinly sliced; 1 to 2 jalapeno chiles (ribs and seeds removed), very thinly sliced lengthwise; 2 tablespoons fresh lime juice; 8 flour tortillas (6-inch); sour cream and lime wedges, for serving