Despite the name, they share almost nothing with Mexican tacos — the tortilla is rolled around the filling and deep-fried, then topped with ketchup, mustard, and mayonnaise rather than salsa.
A corn tortilla is rolled tightly around seasoned ground meat or chicken, deep-fried until crisp, and topped with shredded cabbage, ketchup, mustard, and mayonnaise. Street carts throughout downtown San José sell them as a late-night snack.