Steps
1. Preheat outdoor grill to medium heat.
2. Brushe chicken with olive oil and generously season with salt and pepper.
3. Spread mustard and pesto on both side of the chicken and place it on the preheated grill.
4. Grill chicken for about 5-7 minutes per side or until cooked through.
5. Serve the grilled chicken with your favorite side dish.