Preheat your oven to 400°F and line a large rimmed baking sheet with parchment paper.
Place the cubed aubergine and chickpeas on the baking sheet, drizzling with half of the olive oil and a pinch of salt and pepper.
Season the chicken breast with half of the dried oregano, salt, and pepper, then place it on the baking sheet alongside the vegetables.
Roast for 20 to 25 minutes, or until the chicken reaches an internal temperature of 165°F and the aubergine is tender and golden.
While the ingredients roast, halve the cherry tomatoes and finely chop the fresh parsley.
In a small bowl, whisk together the remaining olive oil, lemon juice, remaining oregano, salt, and pepper to create the vinaigrette.
Once cooked, let the chicken rest for 5 minutes before slicing into thin strips.
In a large mixing bowl, combine the roasted aubergine, chickpeas, fresh cherry tomatoes, and sliced chicken.
Drizzle the lemon-herb vinaigrette over the salad and toss gently to coat before garnishing with fresh parsley.