Combine the olive oil, balsamic vinegar, salt and garlic together in a shallow bowl. Add the chicken breasts and evenly coat. Transfer the chicken breasts over to a nonstic pan heated over medium heat, Sauté until nice, crispy and golden on both sides and cooked through. Remove from heat; allow to cool slightly, and slice into 1-inch slices.
Combine the oil with the herbs and garlic. Brush both sides of each bread slice; grill in a grill pan over medium heat on both sides until golden and crispy.
Combine dressing ingredients in a small bowl/jug, and whisk until mixed through.
Combine the lettuce, tomatoes, onion, Feta and basil together in a large salad bowl. Top with chicken slices and drizzle with the dressing. Toss to combine. Serve with crunchy Bruschetta pieces.