Basic Chicken Fajitas

Ingredients

• 1/3 cup coarsely chopped fresh cilantro
• 2 medium garlic cloves, finely chopped
• 1/2 teaspoon chili powder
• 1/2 teaspoon ground coriander
• 1/2 teaspoon ground cumin
• juice of 1 medium lime
• 3 tablespoons olive or vegetable oil
• 1 pound boneless, skinless chicken breast halves
• kosher salt
• freshly ground black pepper
• 8 (6-inch) tortillas (corn or flour)
• 1 medium bell pepper (any color), cored and sliced into 1/2-inch strips
• 1 medium red onion, halved and sliced into 1/2-inch pieces
• guacamole, for serving (optional)
• salsa, for serving (optional)
• sour cream, for serving (optional)