Add all pickled onion ingredients to a jar and secure the lid. Shake vigorously and allow to sit in the fridge for at least 2 hours before using.
Potato Salad
Scrub and wash potatoes, place in a saucepan, cover with cold water (water should be about an inch higher than the potatoes). Turn heat to high and bring water to a boil.
Once water is boiling add 1 tbsp salt, reduce heat to a gentle boil and cook until potatoes are tender but still slightly firm.
Drain potatoes, rinse with cool water several times. Cut potatoes in half and add to your serving bowl. Add remaining ingredients and stir to combine. Taste and add more salt and/or lemon if necessary.