Preheat the oven to broil.
Spray the eggplant and zucchini with olive oil. Coat the cauliflower in sriracha sauce and olive oil. Place on a baking tray and broil for 20-30 minutes, until slightly brown and crispy.
In a saucepan, saute the mushrooms with a little bit of olive oil until fully cooked.
Slice the four pieces of pita bread. Slightly toast until a little crisp and brown.
Spread hummus on the inside of each pita bread. Sprinkle in the fried onions to the desired amount.
Once all the vegetables are done, add them into the sandwiches. Then serve and enjoy.
