Preheat oven to 400 degrees,
Place sweet potatoes on a shallow baking pan, drizzle with 2 to 3 teaspoons olive oil, sprinkle cubes with ½ tablespoon of the taco seasoning, toss to coat.
Arrange the cubes in a single layer on the baking sheet. Bake for 20-25 minutes until fork tender. Remove from oven and set aside.
While sweet potatoes are in the oven, sauté farro in a skillet over medium heat with the remainder of taco seasoning and 1 tablespoon of water, add more as needed to prevent from sticking. Sauté until well coated with seasoning and heated throughout. (about 2 to 3 minutes).
Heat each corn tortilla in a small skillet over medium heat for 20-30 seconds on each side.
Assemble Tacos
Fill tortillas with farro and 3 to 4 cubes of sweet potatoes.
Top with desired toppings, salsa and sauce.
Garnish with cilantro leaves and serve tacos with a wedge of lime.