Step 1

Toast Mexican oregano in a small skillet over medium-high heat for about 30 seconds. Set aside to cool.

Step 2

Peel onions and thinly slice them. Place 4-5 cups of water in a saucepan and bring to a boil.

Step 3

When water starts bubbling, add sliced onions, and turn the heat off.

Step 4

After 2 minutes, quickly drain the onions into a colander over the sink.

Step 5

Place the drained onions in a glass bowl and add the vinegar, water, oregano, bay leaf and the rest of the spices. Season with salt and mix well. Refrigerate for a couple of hours, and they are ready to eat. They keep well refrigerated for about a week. And they taste best when prepared at least one day in advance.

Step 6

Enjoy with your tacos, tostadas, subs, sandwiches or grilled meats.