1Combine olive oil, balsamic vinegar, soy sauce, Dijon mustard, garlic powder, black pepper, salt, and dried parsley in a small bowl to create the marinade.
2Place the steak, carrots, broccoli, bell pepper, and onion onto a parchment-lined sheet pan.
3Pour the prepared marinade over the steak and vegetables on the sheet pan and toss to coat evenly.
4Bake in the oven until the steak and vegetables are cooked through.