You can use whatever vegetables you have on hand for this veggie-packed breakfast option. Mushrooms or broccoli would be fantastic. For a little more flavor, play with your favorite spices. Garlic and chili powder would provide a little southwestern flair, or consider a dash of ground mustard for a pop of umami. Love a more eastern inspiration? Try curry powder or Chinese five-spice. For an Italian option, add some tomatoes and a blend of garlic, basil, oregano and red pepper flakes.