1/2 red onion
8 limes juiced
1 tsp Mexican oregano crushed
2 serrano peppers
5 Cilantro sprigs + 1/2 bunch finely chopped
1-2 tbs olive oil
3 garlic clove lightly crushed
Kosher salt
Cut the onion in half, remove the outer skin and trim off top. Make a cut down the center to the root. Slice thin and place the sliced onions in a bowl, add some kosher salt and cover with warm water and juice from 1 lime. Let rest for about 10 minutes, drain and rinse well with cold water. Place the cooked langostinos in a bowl and add the lime juice, onion slices, hot peppers, cilantro sprigs, garlic clove, crushed dry oregano and salt. Cover and let marinate in the refrigerator for a couple of hours. Take out the hot peppers, the cilantro springs and the garlic clove and discard. Add the chopped cilantro and a really good olive oil to the marinated langostinos and onions, mix well to incorporate thoroughly. Taste and add additional kosher salt if needed. Serve with salted fresh tortilla chips.