Tinga is a Mexican sauce made from tomatoes, chipotle chilis in adobo, and sliced onions. It is lightly acidic and a bit tart from the tomatoes, a little smoky from the adobo, a little spicy from the chipotle chilis, and rich and balanced with umami from the onion. I like using this recipe for tinga sauce - or you can buy tinga sauce pre-made.