For a spicier kick, add an extra chipotle pepper or a pinch of cayenne pepper. If you can't find young green jackfruit packed in water, you can use jackfruit in brine, but be sure to rinse it thoroughly to remove excess salt. To warm the tortillas, wrap them in a damp paper towel and microwave for 30 seconds, or heat them in a dry skillet over medium heat for a few seconds per side.