You can add lots of different herbs to your tomato egg rings. You can add parsley, chives, thyme, basil, or rosemary to change up the flavor. Of course, you can also just use salt and pepper if you prefer. Other options include adding in season blends such as taco seasoning, fajita seasoning, Greek seasoning, Cajun seasoning, or any of your own favorite blends of herbs and spices.