Created by TeresaS on October 14, 2019
Step 1: Position racks in upper and lower thirds of oven; preheat to 425°F. Coat 2 large rimmed baking sheets with cooking spray.
Step 2: Using a vegetable spiralizer, cut onion into long thin strands. Place in a large bowl and toss with oil.
Step 3: Pulse bread in a food processor into crumbs. Add to the onions along with Parmesan, pepper, 1/4 teaspoon salt and cayenne; toss to coat. Divide between the prepared pans.
Step 4: Bake, stirring once halfway through and rotating the pans from top to bottom and back to front, unit browned in spots, 25 to 30 minutes. Sprinkle with the remaining 1/4 teaspoon salt and serve hot.