15-Minute Sheet Pan Lemon Pepper Chicken

large lemon, sliced into thin rounds

about 1.25 pounds boneless skinless chicken breasts, cut into bite-sized pieces

fresh green beans, trimmed and halved

of one large or 1 medium red onion, sliced into strips or small chunks

to 3 tablespoons olive oil

to 2 teaspoons freshly ground lemon pepper seasoning blend

kosher salt, or to taste

freshly ground black pepper, or to taste

fresh parsley, optional for garnishing

optionally finish with Parmesan cheese, garlic, soy sauce, chili garlic sauce, etc.