1 red onion
1 cup lime juice
2 tbsp white vinegar(optional)
1 tbsp salt
1 tsp black pepper (Whole peppercorn preferred)
1 tsp Mexican oregano (optional)
Thinly slice the red onion by cutting in half, peeling, then slicing as thin as possible. If you have a mandolin, use that.
Add the onions to a large bowl along with the whole black peppercorns, salt and lime juice, vinegar and oregano if using. Mix it all together.
Continuously mix the onions to make sure they're all getting coated in the lime juice. After 30 minutes they should be perfectly wilted and ready to enjoy.
Store in the fridge for up to 2 weeks.