Whisk 2 tablespoons olive oil, garlic powder, dried basil, 1 teaspoon salt, and 1/2 teaspoon pepper together.
Place chicken in a shallow dish, and spoon the marinade over the top. Set aside as you chop/prep the veggies.
Meanwhile, start the balsamic reduction by bringing the balsamic vinegar to a boil in a small saucepan, and reducing it to a simmer immediately (it will burn if boiled too long). Simmer until the liquid has reduced by half and the balsamic coats the back of a spoon, about 10-12 minutes, then remove from heat and whisk in the honey. Allow reduction to cool.
Heat a large skillet over medium. Sear the chicken on each side until cooked through, internal temp will be 165 when done. Set cooked chicken aside on a plate and allow it to cool for at least 10 minutes before slicing it into thin strips
In a large bowl, toss the romaine, tomatoes and mozzarella in completely cooled balsamic reduction, plus 2 remaining tablespoons of oil, 1 remaining teaspoon of salt, and 1/2 teaspoon pepper. Plate, and top with sliced chicken and basil. Enjoy!