Preheat the oven to 350 degrees.
Line a cookie sheet with parchment paper.
Clean mushrooms and place rib side up on the parchment-lined cookie sheet.
In a large mixing bowl, mix all ingredients. Break up the turkey sausage until all ingredients are well combined.
If using Portobello mushrooms, use a large spoon to fill the Portobello mushroom caps, dividing the mixture between the four mushrooms.
If using the white/button mushrooms, use a tablespoon to fill the white/button mushroom caps.
For Portobello mushrooms, place in a preheated oven and cook for 25-30 minutes or until golden brown.
For white/button mushrooms, place in a preheated oven and cook for 12-15 minutes or until golden brown.
Serve with pickled jalapeƱos, avocado, lime wedges, and hot sauce.