Step 1

Place the chilis, garlic, salt and water in a saucepan and set over high heat. Bring to a boil and reduce the heat to a simmer. Cook, covered, until the chilis are softened, 15 to 25 minutes depending on their size.

Step 2

Remove from the heat and add the vinegar. Using a blender or an immersion blender, puree until smooth.

Step 3

Stir in the chili flakes, pour into a jar of your choice and refrigerate.