The menu says it comes with "pierna desmenuzada, mojo y cebolla"--what you're getting is roast pork (shredded leg meat, specifically), mojo sauce, and diced onions on Cuban sandwich bread. The bread is cut lengthwise, and the assembled sandwich is cooked in a press, yielding crispy top and bottom crusts.
'pan con lechon' on Serious Eats
While all the attention is lavished on the Cubano, the Pan con Lechon harbors a secret prize for the pork lover. The roasted pork here is lightly shredded and piled high on toasted Cuban bread, complemented by the sweetness of grilled onions. Then comes the highlight of the sandwich and the reason it beats out the Cubano: Café con Leche's garlic sauce.