2 pounds thinly cut flap meat
Salt and freshly ground black pepper
2 tablespoons fresh thyme leaves, roughly chopped
1 tablespoon crumbled dried Mexican oregano
1 cup freshly squeezed orange juice (from 3 oranges)
2 tablespoons vegetable oil
4 bolillo rolls, halved lengthwise
Mayonnaise
2 avocadoes, sliced
2 tomatoes, sliced
Pickled jalapenos