Clean the mushrooms (eggplants or jackfruit) and pull them into thin strips. You can use a knife to cut a slice in the vegetables to make it easier to pull them into sheds. Alternatively, you can slice them thinly.
In a large skillet, heat the olive oil over medium heat. Add the sliced mushrooms, eggplants, or jackfruit. Sauté for 5-7 minutes until the mushrooms are tender.
Add the smoked paprika, onion powder, garlic powder, salt, and black pepper to the skillet. Mix well to coat the mushrooms (eggplants, or jackfruit).
Pour the marinade if using, stirring constantly as the ‘chicken’ fries. Bring the mixture to a simmer and continue stirring until it thickens and coats the mushrooms.Reduce the heat to low and let the ‘chicken’ simmer for 5-10 minutes until they are golden browned and the mushrooms (eggplants or jackfruit) are tender.
Using a fork, shred the mushroom mixture into small "chicken-like" pieces if you want them even smaller. Serve the shredded vegan chicken on a sandwich, in tacos, on top of a salad, or any way you like!