In a large bowl, stir together the coleslaw mix, red onion, almonds, goji berries, basil and shredded chicken until well mixed.
In a separate, medium bowl, stir together the Greek yogurt, Dijon mustard, honey and a generous pinch of salt until well combined.
Pour the Greek yogurt mixture over the coleslaw mix and stir until the coleslaw mix is evenly coated and creamy.
Divide the avocado slices between two slices of the Millet-Chia bread. Then, divide the apple slices on top of the avocado slices.
Divide the coleslaw mixture evenly between the two slices, on top of the apples, and then place the remaining slices of bread on top. These sandwiches are big, so you really need to press that top bread down!
If you don't buy yours pre toasted, just pop them into a 350 degree oven on a small pan for a few minutes! * You can use any kind of leftover chicken breast = baked, boiled, slow cooked etc. Just make sure it's plain and shredded.