I love those mcmuffins at Macca's but they're actually really easy to do at home. I just got some english muffins from safeway and popped them into the frying pan with the bacon and egg without adding oil [the fat from the bacon was enough to fry everything up] and piled them together like this.
then a slice of cheese and some ketchup there that's it! a bacon and egg and cheese mcmuffin. heheee the only difference is that the ones at Macca's are much saltier!