Cut beef into one-inch cubes. Place meat in a deep dish. Cover with soy sauce, teriyaki sauce, wine and steak seasoning. Allow beef to marinate for at least 30 minutes to 2 hours.
Prepare bell peppers, mushrooms and onions. Place them in a large bowl and season with salt and pepper.
Thread beef, mushrooms, bell peppers and onion on to a skewer.
Grill for about 3 minutes on per side, or until the outside has a nice crust.
Allow skewers to rest for about 5 minutes before serving. Enjoy!