Preheat your oven to 400 degrees.
Line a baking sheet with parchment paper or a silicone baking mat.
Cut chosen vegetables into bite-sized, equal pieces.
Toss the chopped vegetables in garlic powder, onion powder, pepper and salt.
Place vegetables in a single layer on the baking sheet.
Bite-sized pieces will roast in 30 minutes; the smaller you cut the vegetables, the quicker they will roast, so watch them carefully.
In the meantime, chopped tomatoes, shred the carrots and cut the spinach into smaller pieces; set aside.
Removed vegetables from oven, and allow them to cool enough to touch.
Preheat the panini maker, grill or skillet (you do not need oil)
Using the lavash on a flat surface, put a thin layer of hummus on the base of the bread through the middle.
Add raw vegetables first: Spinach, carrots, and tomatoes (they provide a barrier for the roasted vegetables, so you can roll your lavash without breaking from the moisture in the cooked vegetables.
Roll it like a tortilla, but you don't need to tuck in the sides like a burrito.
Place on panini maker and grill on medium-low until toasted.
Or, you can use a skillet, and cook on medium-low, turning every 5 minutes until browned on both sides.
Cut and serve.
I served the lavash bread sandwiches with a side salad.