01 - Preheat a grill or grill pan over medium-high heat. Season the chicken breasts generously with salt and black pepper on both sides.
02 - Place the chicken on the grill and cook for 5–7 minutes per side, until the internal temperature reaches 165°F and juices run clear. Transfer to a plate and let rest for 5 minutes before slicing thinly against the grain.
03 - In a small bowl, whisk together the extra-virgin olive oil, balsamic vinegar, Dijon mustard, and honey until emulsified. Season with salt and pepper to taste.
04 - In a large salad bowl, combine the mixed greens, sliced strawberries, red onion, avocado, and chopped pecans. Toss gently to distribute evenly.
05 - Arrange the sliced grilled chicken over the salad and sprinkle the crumbled goat cheese on top.
06 - Drizzle the balsamic vinaigrette over the salad just before serving. Toss lightly if desired, or serve with dressing on the side.