Microwave your veggie burger on a plate for about 1 minute on high. Check the burger. You want hot and about ready, but not getting tough. Then add the slice of cheese and microwave for 30 seconds on high. If the cheese is not melted at that point, put it back in the microwave for 5-10 more seconds. Cut the cheeseburger into strips. Put it on top of the lettuce.
Drizzle your ketchup on top like salad dressing, or put out a little cup to dip into.