Place sliced shallots in a small glass jar.
Heat remaining ingredients in a saucepan over medium heat until simmering.
Pour vinegar mixture into the jar with the shallots. Let sit at room temperature for at least 30 minutes before using. If you are not eating them immediately, cover and refrigerate the pickled shallots once the mixture has cooled to room temperature. Quick Pickled Shallots will keep in the fridge for up to 2 weeks.
To store: Once the pickled shallots have cooled to room temperature, tightly seal in a jar and transfer to the refrigerator. They will keep for up to 2 weeks but are at their best within the first 5-7 days.
Calories: 23kcal | Carbohydrates: 5g | Protein: 0.3g | Fat: 0.04g | Saturated Fat: 0.01g | Polyunsaturated Fat: 0.01g | Monounsaturated Fat: 0.01g | Sodium: 148mg | Potassium: 39mg | Fiber: 0.4g | Sugar: 4g | Vitamin A: 3IU | Vitamin C: 1mg | Calcium: 7mg | Iron: 0.2mg