Preheat oven to 350 F.
In a bowl large enough to hold the chicken, whisk together the balsamic vinegar, olive oil, pepper, and 1 Tbsp salt. Add chicken and marinate for 20-30 minutes.
While chicken marinates, whisk together the ingredients for the vinaigrette in a bowl and set aside.
When chicken is done marinating, remove and bake for approximately 40 minutes or until cooked through (165 F). Cool and slice.
Prepare your salad while the chicken bakes and cools.
Toss together chopped lettuce, tomatoes, cucumber, artichokes, and sliced olives. Top with sliced chicken and feta crumbles. Drizzle with vinaigrette. Devour!