Preheat the oven to 425º F, preferably set to convection mode.
In a large bowl, toss the chicken with the brown sugar, spices, salt and olive oil. Add the lemon slices and toss once more to coat. Spread the chicken onto a sheet pan, being careful not to overcrowd.
Bake for 15 minutes, toss, and bake for another 4-7 minutes until crisp and caramelized.
For the slaw, mix the yogurt, herbs, lemon juice, olive oil and salt in a large bowl. Add the shredded cabbage and toss to combine. Let sit for 10-15 minutes before serving.
To serve, warm the pitas in the microwave and stuff each one with slaw, chicken and avocado.
