Heat the olive oil in a large sauté pan or Dutch oven over medium-high heat. Add the jalapeños, carrots, onion, and garlic and cook for 10 minutes, stirring occasionally.
Add the remaining ingredients to the pan, mix together, and bring to a boil. Reduce the heat to low and simmer for 10 minutes.
Remove the pan from the heat and transfer the vegetables to a container or jar. Pour the cooking liquid on top of the vegetables to cover them completely, and let them sit on the counter to cool to room temperature.
Once cooled, store in the refrigerator for up to 1 month.
Notes
Use fresh produce. Fresh jalapeños, carrots, and onions make all the difference in flavor and texture.
Glass jars are best. Avoid plastic containers, as the acidity of the vinegar can react with plastic. I really like these glass mason jars.
Don't have whole black peppercorns? You can omit them, and the flavor won’t be drastically affected.
Increase the shelf life. This recipe uses a quick pickling method that will keep your jalapeños fresh in the fridge for up to 1 month. To increase shelf life, use proper canning techniques so they can last you year-round.
Adjust the spice level. You can adjust the spice level of your pickled jalapeños by removing or leaving in the ribs and seeds. For a mild spice, remove them, and for an extra spicy kick, leave them in.