Preheat oven to 425F and move the rack to the middle position. Line a baking sheet with foil.
Peel and slice the sweet potato into ½" inch thick slices. Cut the larger slices into quarters. Place the pieces on the baking sheet and toss with a tablespoon or so of olive oil. Lightly sprinkle the pieces with Italian seasoning, garlic powder, and salt & pepper. Roast for 30 minutes.
Meanwhile, combine dressing ingredients in a small bowl and prep the onion, avocado, and arugula. I did toss the arugula with a tiny bit of olive oil and a squeeze of lemon juice for the photos. This step is optional.
Once the sweet potatoes are ready, let them cool for a couple of minutes and then assemble your pitas. Serve immediately.
