Bring a few inches of water to boil in a medium pot and fit it with a steamer attachment. Steam the tempeh slices for 10 minutes.
Heat 2 teaspoons of the avocado oil in a fry pan over medium high heat. Add the tempeh strips. Brush them lightly with tamari or Bragg Liquid Aminos (small containers of liquid aminos usually have spray nozzles, so you can also lightly spray them). Cook the strips for 2 minutes, or until browning on the bottom. Flip them, brush the new upturned side with tamari or Bragg's, and continue cooking for another 4 minutes, or until the tempeh slices are cooked on both sides.
Prepare the tortillas
Preheat your oven to 400F. Lightly brush the tortillas with the remaining 1 tablespoon of the avocado oil. Transfer the tortillas to a baking sheet. Bake them for 4-5 minutes, or until they're crispy, then set them aside.
Make the slaw
Place the the cabbage and carrot into a large mixing bowl. Whisk together the lime and orange juices, oil, salt, and pepper. Pour the dressing over the salad to vegetables. Toss the slaw together until well mixed.
Assemble the tacos
Top each crispy tortilla with a third cup of the slaw. Add a few slices of tempeh and slice slices of avocado. Serve right away.