Smoky Barbecue Pulled Beef Sandwiches

In a large mixing bowl, whisk together the juice of 2 lemons, 3 teaspoons of olive oil, 4 minced garlic cloves, 1 chopped chili pepper, 2 teaspoons of parsley, 1 teaspoon of salt, 1/2 teaspoon of black pepper, and 1 teaspoon of cumin. Whisk thoroughly to blend the ingredients until the salt and cumin are fully dissolved. Add the chicken pieces to the bowl, making sure each piece is well coated with the marinade. Massage the marinade into the chicken to maximize flavor absorption. Cover the bowl with plastic wrap and let it marinate for at least 20 minutes at room temperature. For more intense flavor, refrigerate the chicken for up to 2 hours.