A popular choice for teriyaki is chicken, as it soaks up the flavors of the sauce and has a mild flavor that goes well with the sweet and savory teriyaki.  Other common meats to use in teriyaki dishes include beef, pork, and seafood like salmon or shrimp. Veggies like bell peppers, mushrooms, and onions are also popular additions to teriyaki dishes.  Tofu can also be used as an alternative to meat for a vegan and vegetarian-friendly option.