In a small bowl combine minced parsley, lemon zest, paprika, chilli powder, cumin, garlic, brown sugar, pepper, salt and olive oil.
Give everything a nice whisk and pour the blend over the chicken thighs. Mix well until chicken is coated into spices. Let the chicken marinate for 30 minutes.
Preheat your grill pan for 5 minutes and cook chicken thighs for 5 minutes on each side.
Remove from the grill and let it rest.
Wipe the grill pan with a paper towel and put it on the heat again. Place halved peaches on a grill and cook for a few minutes on each side until distinctive grill marks are seen.
On a cutting board, thinly slice your chicken and set aside.
In a small bowl whisk together ingredients for the vinaigrette.
In a serving bowl combine arugula, chicken, peaches, red onion, grape tomatoes and feta cheese. Drizzle with vinaigrette and serve immediately.