Bake the Chicken: Preheat oven to 400°F (200°C). Rub the chicken with 1 tbsp olive oil, garlic powder, basil, salt, and pepper. Bake for 15-18 minutes or until fully cooked. Let cool, then shred the chicken.
Assemble the Salad: In a large bowl, combine arugula, chickpeas, cucumber, and sun-dried tomatoes.
Make the Dressing: In a small bowl, whisk together 1 tbsp olive oil, lemon juice, salt, and pepper.
Serve: Toss the salad with the dressing, then top with shredded chicken and feta cheese.