Pickled red onion

Name: Pickled red onion
Prep time: 10 min
Total time: 25 min
Ingredients: 2 teaspoon Mexican oregano; 1 bay leaf; 1 teaspoon black peppercorns; Pinch salt; 1 cup water; 2 tablespoons white vinegar; 2 red onions (thinly sliced); 1-2 limes (juiced)