Step 1. Cook the onion, crumbled tofu, and salt for 5 minutes. Add the garlic powder, black pepper, poultry seasoning, and ground mustard and cook another 30 seconds.
Step 3. Add tofu mixture, nutritional yeast, breadcrumbs, cornstarch, kala namak (if using), and salt to the mashed potatoes. Use your hands to incorporate the ingredients until a dough forms.
Step 4. Form a large ballwith the dough and divide it evenly into two equal parts. Then shape both parts into a roughly oval or oblong shape, like a cooked turkey.
Step 5. Wet one spring roll wrapper and place it over one tofu turkey. Then flip the turkey over and use a second wet spring roll wrapper to cover the bottom. The sides of both rice paper wrappers should overlap.
Step 6. Bake for 10 minutes. Mix the tamari, maple syrup, and sriracha in a small bowl. Brush the glaze over the top and sides of the turkeys. Bake for 10 minutes more, and brush again. Continue cooking until the rice paper is crispy and browned all over.
Place the turkey onto a cooling rack before slicing. Reheat the slices in the oven as needed. Place them on a baking sheet, cook for about 15 minutes, and flip them over halfway.