3/4 cup salsa
1 tablespoon cider vinegar
1 small white onion, thinly sliced
1 tablespoon vegetable oil
1 whole rotisserie chicken, shredded (best to do this while the chicken
is still warm)
1/2 teaspoon salt
2 fresh tomatoes, diced
1 ripe avocado, diced
mexican queso cheese, finely grated
chopped fresh cilantro stems (to garnish)
Combine the salsa and vinegar in a bowl, stir and set aside.
In a large skillet, heat the oil and cook the onions over medium heat until they begin to caramelize, 5-8 minutes.
Add salsa mixture to skillet, simmer until well reduced, add chicken, stir, heat and then cool slightly; season with salt.
Top each tostada with some chicken mixture, add avocado, tomato and cheese and sprinkle with cilantro.