So, egg sandwiches aren't the most complicated things to make, but there's probably an even easier way to make one you've never thought of before. Just pour your eggs into a hot pan with oil or butter, place two slices of bread down and then flip them both over. Make sure that the slices of bread are touching and facing in the same direction. Next, flip everything over, including the omelet.
You can flip one of the slices over and on top of the other, forming a sandwich. Just make sure you wait long enough for the bread to toast properly.