Make the breadcrumbs using the same directions but in a large pot over medium heat, then wipe out or wash pot. Add water, pasta, cauliflower, butter, onion flakes, nutmeg, and salt to large pot. Bring everything to a boil, reduce to medium, and cook for 10 to 15 minutes, stirring often, until noodles are cooked. Add additional water if it looks dry before noodles are tender. Mash cauliflower to form sauce, and stir in cheese until melted. Taste and season with salt, if needed. Cover and rest for 5 minutes before serving. Stir pasta and serve topped with breadcrumbs, peas, and black pepper.