Grill or roast the chicken breast until fully cooked, then let it cool and dice into bite-sized pieces.

In a mixing bowl, whisk together honey, Dijon mustard, olive oil, apple cider vinegar, minced garlic, salt, and pepper until smooth.

In a large bowl, combine mixed salad greens, cherry tomatoes, cucumber, red onion, and feta cheese.

Add the diced chicken and drizzle with the honey mustard dressing. Toss gently to combine.

Divide the salad among plates and serve immediately.