This is a quick breakfast sandwich that I will put up against the best of any you can buy at a fast food restaurant. Clean up is minimal and quick. No skillets, mixing bowls or any of the other things you would normally use in a from scratch meal. My girlfriend who is not fond of preparing meals, turned me on to something she called "egg in a cup". We had been making variations of it for a couple of years. One morning I decided to add ham to the "egg in a cup" and place it between an English muffin. I then served some to friends who seemed to like them and asked how they were made. So, here it is. Hope you like it. To change things up, you can omit the ham and add finely diced onion, bell pepper, mushroom and tomato or spinach to the top of the egg before you add the shredded cheese. It makes a mini omelet that you can serve by itself, the original "egg in a cup" or on the muffin.