With just a little prep work, you get a veggie-filled breakfast with a slightly spicy kick from the red pepper flakes but feel free to add whatever spices and veggies you like. Some good options are onions, asparagus, garlic powder, cumin, cayenne pepper, or whatever is in season or you have in your refrigerator or cupboard.
Also, to chop the tomatoes, it works best to remove the seeds so that the mixture isn't too juicy. The easiest way to do this is to set the tomato on the cutting board and cut the tomato from top to bottom, removing the meat from the 'core' of the tomato. Alternatively, cut the tomato in half horizontally and squeeze the juice and seeds out. Either way, you'll be happy to not be dealing with all of the extra liquid and your frittata will set much better.