In a saucepan heat olive oil and add onion, garlic, and spices. Sauteé for about 2-3 minutes.
Add chipotle sauce and jackfruit with brine. Don't rinse it or drain it. With a wooden spatula, try to beat jackfruit a little bit until it resembles pulled pork. If you can't beat some pieces, leave it there. Tey will soften later.
Sauteé for about 5 minutes, then add tamari sauce and agave or maple syrup, if using. If the jackfruit starts sticking at the bottom, add some more water. Cook it for another 10 minutes.
Taste the jackfruit mix and add salt and/or pepper. Take it off from the heat and let it cool down.
Asamble your tacos: Put some shredded cabbage att the bottom of taco shells, add the jackfruit mix and top it with avocado pieces, lime wedges, and fresh coriander leaves. Add also some chipotle sauce if you like. Enjoy!