Taco King Truck
Corner of Bleecker & Thompson
Greenwich Village, NYC
If you can endure the cold, are in the Village, then go check out this taco truck. It's parked on the corner of Bleecker and Thompson Street.
Here's the skinny: They have a decent carne asada taco, definitely worth checking out. The portions are healthy, so ordering two will be be enough. The red salsa packs a nice light punch, if you want to control the amount of salsa you make sure you convey "salsa on the side."
The truck is usually parked at this corner starting at 12pm, straight through the evenings. Might be best to go off-peak hours since it's very close to NYU.
Carne asada tacos start at $2.50, and it's $3.00 for beef tongue.