Using a saute pan, preheat the vegetable oil over medium heat. Trim the ends of the Brussels sprouts and split in half from top to bottom. When the oil just begins to smoke, carefully add the halved Brussels sprouts to the pan. Saute until they are slightly crispy and brown, 2 to 3 minutes.
Remove the Brussels sprouts from the pan and let them drain for about 3 minutes on a dry paper towel.
In a mixing bowl, place the fried sprouts, frisee, Pickled Red Onion, parsley leaves and radishes and toss. Add the cranberries, crumbled pork rind and Tamarind Vinaigrette. Toss well. Season with the cilantro leaves, seasoning, salt and pepper. Toss again.
Arrange the salad in a long oval salad bowl. Bring the cilantro leaves to the top of the salad.
Garnish with the manchego cheese grated over the salad.
Combine the vinegar, 1/4 cup water, the sugar, oregano, salt, black pepper, pepper flakes, cloves and bay leaf in a heavy medium saucepan and set it over medium-high heat. Bring the mixture to a boil, and then add the onion slices, separating them into individual rings. Let the mixture come back to a boil, and then reduce the heat and cook until the onions soften and wilt, 3 to 4 minutes.
Remove the saucepan from the heat, cover and let the mixture cool completely. Transfer the onions and their pickling liquid to a quart-size glass jar or divide among plastic containers. Cover and refrigerate for up to 2 weeks.
Add the puree, vinegar and salt to a metal bowl. Slowly whisk in the oil.