This is a test of commonsense. Complete the next sentence:

How to make a ham and cheese sandwich
Cut a baguette in half lengthwise using a serrated knife.
Try to get one that is about 26 inches (66.04 centimeters) long. You can choose to include the heel, or cut it off.
Spread butter on one side of the baguette and the mustard on the other. If you don't like mustard, then simply use more butter instead.