In a large bowl, massage the kale for a minute or two with the juice of 1 lime and a pinch of salt. Add the pineapple, half the chopped jalapeño, and half the chopped cilantro.
Cook the filling:
In a large cast-iron skillet, heat the oil over medium-high heat. Add the onion and cook for 5 minutes, or until soft. Add the peppers, garlic, and remaining jalapeño and cook for 3 minutes, or until the peppers begin to soften. Add the mushrooms and seasoning and cook for an additional 3 minutes.
Assemble:
To serve, place a bed of the kale-pineapple mixture on each tortilla, top with the veggie mixture, and drizzle with dressing. Serve with sliced avocado, the remaining cilantro, and lime wedges on the side, if desired.