01 - Whisk together olive oil, balsamic vinegar, honey, Dijon mustard, minced garlic, salt, and black pepper in a small bowl until emulsified.
02 - Place chicken breasts in a shallow dish. Pour 2 tablespoons of the dressing over the chicken and turn to coat. Marinate for 10 minutes. Reserve remaining dressing.
03 - Set a grill or grill pan over medium-high heat and allow it to preheat fully.
04 - Place marinated chicken on the hot grill. Cook for 5 to 6 minutes per side, or until fully cooked and juices run clear. Transfer to a plate and rest for 5 minutes.
05 - Brush peach halves lightly with olive oil. Grill peaches cut side down for 2 to 3 minutes, until grill marks appear and the fruit softens. Slice peaches after grilling.
06 - In a large bowl, massage chopped kale with a pinch of salt for 1 to 2 minutes until slightly tender.
07 - Add sliced red onion, basil, mint, crumbled feta, and toasted pecans to the kale. Toss gently to combine.
08 - Slice rested chicken breasts and grilled peaches. Arrange over the kale mixture. Drizzle with reserved dressing and toss lightly to coat.
09 - Serve immediately while fresh.