First, preheat your oven to 400 degrees Fahrenheit and place the Carolina Reaper peppers, garlic, and onion on a baking sheet.
Then bake all of them for 15-20 minutes or until the skins slightly char. Monitor carefully to avoid burning.
At this point, you have to put roasted vegetables into a food processor, along with vinegar and salt. Mix until chunky.
Add half a cup of water and blend until the sauce reaches the desired consistency.
Now, strain if necessary, and then pour them into sterilized bottles and store them for later use.
Allow to sit and meld flavors before serving. Serve it with your favorite savory dish.