Dressing: Place all dressing ingredients in a small food processor and pulse until smooth.
In a large bowl, combine chicken thighs with oil, all the spices, salt and pepper.
Heat oil in a large skillet over medium-high heat. Add chicken and cook both sides until dark brown (about 4-5 minutes each side).
Remove onto a plate and cover loosely with foil. Rest for 5 minutes then slice thickly.
Arrange salad leaves, cherry tomatoes, red onion, cucumber, olives onto a serving platter then place the chicken on top.
Drizzle with Avocado Dressing.