Cook the pearl barley according to packet instructions. Also cook the sweet potatoes either in the oven or leave until the pearl barley is almost done cooking and microwave it until fork tender. Leave to cool a bit, and set aside. Heat up the chicken pieces in a pan if using frozen, otherwise if using precooked, leave it as is. Drain off the pearl barley once it's cooked through and tender.

In a large bowl add in the mixed salad leaves, the cooked pearl barley and chicken pieces then remove the sweet potato from its skin and dice it, then add that in too. Season well with salt and pepper, toss everything together.