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

How to make vegetarian pho
Char or broil the onion and ginger until lightly blackened.
Grab 1-2 pieces of onion and ginger with tongs and hold them over an open flame until they've blackened slightly. Place the charred pieces on a plate and pick up a few more pieces with your tongs.
Continue in this way until you've charred all of the onion and ginger. To broil, place the onion and ginger in a shallow pan and slide the pan under your broiler.