Tacos El Tajin serves tacos in a truck setup, with the fillings built to order and finished with salsa and simple garnishes. The appeal is the quick lunch rhythm and the focused menu, which keeps the food centered on tortillas, meat, and condiments rather than extras. The tacos are best thought of as street food: hot, portable, and meant to be eaten right away. Review chatter points to it as a dependable South Lake Union taco stop, especially for weekday service.