Season the chicken with salt and black pepper. In a small dish, combine 2 tablespoons EVOO, the mustard and the crushed red pepper. Spread the mixture all over the chicken. Place the chicken, meaty side down, in a nonstick skillet. Set a piece of foil loosely over the chicken, then place a plate or smaller pan on top and weight it down with a brick or cans. Cook the chicken over medium heat until cooked through, 25 minutes.
While the chicken cooks, whisk together the vinegar, marmalade and poppy seeds, then stream in the remaining 3 tablespoons EVOO. Toss the tomatoes, cucumber and Arugula with the dressing and season with salt and black pepper. In a small bowl, combine the parsley, banana peppers and pepper juice. Top the chicken with the parsley-pepper mixture and serve with the salad and the bread.