How to preserve Peppers. I am going to show you how to preserve your Sweet Caribbean Peppers (or Habaneros). The first thing to do is to remove the stem of the pepper cut it in half and place it with seeds and all in a food processor then add some garlic, onion and process it. Once processed transfer the pepper to a bowl and then we will add our preservative agents, the first one is apple cider vinegar, a little bit of lemon and finally a little bit of sugar. Mix well and transfer our mixture to