01 -
In a medium bowl, whisk together balsamic vinegar, olive oil, minced garlic, salt, and freshly ground pepper until thoroughly combined.
02 -
Place chicken breasts in a shallow dish and pour marinade over them. Ensure each breast is evenly coated, then cover and refrigerate for at least 20 minutes, up to 2 hours.
03 -
Gently combine diced strawberries, finely chopped red onion, chopped basil, balsamic vinegar, honey if using, and a pinch of salt in a small bowl. Stir lightly and refrigerate until ready to use.
04 -
Heat a grill or skillet over medium-high heat. Remove chicken breasts from marinade and cook for 5 to 7 minutes per side, ensuring a deep sear and that the interior is fully cooked.
05 -
Transfer cooked chicken to a plate and rest for 5 minutes. Slice chicken across the grain into portions.
06 -
Plate sliced chicken and top each piece generously with the strawberry basil relish. Serve immediately.