1 pound top round steak, cut into small pieces
2 tablespoons olive oil
2 tablespoons chopped fresh cilantro
1 teaspoon ground cumin
1 tablespoon dried oregano
1 pinch cayenne pepper, or to taste
salt and ground black pepper to taste

2 cups plain yogurt
1/2 cup mayonnaise
1 pinch cayenne pepper
1 tablespoon dried dill weed
2 tablespoons chopped fresh cilantro
1 lime, juiced
salt to taste

1 1/4 cups chopped fresh cilantro
1 onion, finely chopped
8 (7 inch) flour tortillas
1 cup shredded Mexican cheese blend