Pickled Red Onions

Name: Pickled Red Onions
Prep time: 300 s
Cook time: 1800 s
Total time: 2100 s
Yield: 8
Ingredients: 1 red onion; 1 cup lime juice; 2 tbsp white vinegar(optional); 1 tbsp salt; 1 tsp black pepper (Whole peppercorn preferred)