Preheat oven to 400 degrees F.
In a large bowl, toss all the cut vegetables, except for the tomatoes, with olive oil until each piece is coated and then sprinkle with salt and freshly ground black pepper. Transfer the vegetables to a baking sheet and roast until tender. Allow the vegetables to cool and then place them in a large bowl. Toss in the tomatoes and arugula until combined.
Raise oven temperature to 425 degrees F.
Cut each sheet of phyllo in half widthwise. Spray each sheet with cooking spray and then stack the sheets so that there are 2 layers. Lay the phyllo lengthwise vertically and place about 1/2 cup of vegetable mixture in the center. Roll up and tuck in the sides to make a strudel. Spray the outsides with cooking spray and then bake until golden brown, about 20 minutes. Top the strudel with Roasted Red Pepper Coulis and serve.
Heat the olive oil in a small saucepan over medium heat. Add the peppers, onions, leeks, and garlic and saute until translucent and the garlic is slightly brown. Add the basil, oregano, and cilantro, along with the vegetable stock, and salt and pepper, to taste; simmer over medium-high heat for approximately 10 minutes. Pour the mixture in a blender and puree until smooth*, while slowly drizzling extra-virgin olive oil into the pitcher. Strain the mixture through a coarse strainer and serve over the strudel.
*When blending hot liquids: Remove liquid from the heat and allow to cool for at least 5 minutes. Transfer liquid to a blender or food processor and fill it no more than halfway. If using a blender, release one corner of the lid. This prevents the vacuum effect that creates heat explosions. Place a towel over the top of the machine, pulse a few times then process on high speed until smooth.
This recipe was provided by a chef, restaurant or culinary professional. It has not been tested for home use.