Whisk together marinade in a bowl.
Add mushrooms, bell peppers and poblano to marinade and let sit for 1-2 hours.
In a large saucepan, add mushrooms, bell peppers, and poblano with a ¼ cup marinade and spices. Saute on medium low heat for 10-15 minutes, until veggies are soft and liquid has dissipated.
As mushroom mixture is almost finished being cooked, heat up tortillas. Then dice the avocado and cilantro.
Once tortillas are cooked, assemble your tacos by scooping mushroom mixture onto your tortillas, and layering with avocado and cilantro. Serve with your favorite salsa and enjoy!