Combine jalapeno, corn and lime juice in a bowl and mix until incorporated. Set aside.
To a small pan on medium heat add sliced mushrooms with a little bit of water and place lid on until mushrooms are soft. Add in spices and cook another 1-2 minutes. Remove from heat.
Mash avocado onto toast slices and top with mushrooms and jalapeno corn salad. Finally drizzle with optional sriracha.