Steak Fajitas with Tomato-Corn Relish

Fajitas

• 1 cup thick and chunky cilantro salsa
• 2 cloves garlic, finely chopped
• 1 1/2 teaspoons chipotle chili pepper powder
• 1/2 teaspoon salt
• 1/2 teaspoon ground cumin
• 1 1/4 to 1 1/2 lb beef flank steak, trimmed of fat
• 1 sweet onion, cut into 3/4-inch wedges
• 1 medium red bell pepper, cut into 3/4-inch strips
• 1 medium yellow bell pepper, cut into 3/4-inch strips
• 12 low-fat flour tortillas (8 inch)
• Fat-free sour cream, if desired

Relish

• 1 can (11 oz) whole kernel sweet corn, drained
• 1 large tomato, chopped (about 1 cup)
• 3 tablespoons finely chopped cilantro
• 1 tablespoon lime juice
• 1/8 teaspoon salt
• Freshly ground black pepper, if desired