Preheat a skillet over medium heat and add olive oil.
Season chicken with oregano, thyme, garlic powder, salt, pepper, and lemon zest.
Cook chicken 6–8 minutes per side until golden and internal temperature reaches 165°F (74°C). Remove from skillet and let rest 5 minutes.
Slice chicken into strips or bite-sized pieces.
In a small bowl, whisk together olive oil, lemon juice, Dijon mustard, honey, salt, and pepper for the vinaigrette.
In a large salad bowl, combine arugula, cherry tomatoes, cucumber, red onion, and parsley.
Top salad with sliced chicken and drizzle with lemon vinaigrette. Toss gently to coat evenly.
Serve immediately.