Step 1

Add garlic, serrano or jalapeño pepper (if using), and radishes to a jar with a lid.

Step 2

In a liquid measuring cup, whisk the vinegar, water, sugar (if using), and salt.

Step 3

Pour the vinegar mixture into the jar of radishes.

Step 4

Cover the jar and refrigerate for at least 30 minutes, or until desired flavor is reached. (I like the radishes best after at least 1 hour of soaking.)