Melt the butter in a large skillet over medium heat. Add onion, carrot, celery, and seitan and cook 5–7 minutes or until the vegetables are soft and onions are translucent. Add the garlic and cook one additional minute until fragrant.
Add the vegetable broth, sage, rosemary, thyme, and salt; stir until everything is well combined. Bring the broth to a bubble, then turn off the heat. Add the stuffing mix and stir to combine everything. Cover with a lid and let sit for 5 minutes.
Remove the lid and fluff the stuffing. Transfer to a serving dish; garnish with fresh parsley, if desired. Serve hot.
Notes
This is a list of stovetop stuffing mixes that are confirmed vegan as of November 2025: 365 Everyday Value Organic Vegan Multigrain Stuffing Mix, Aleia’s Gluten-Free Savory Stuffing Mix, Starseed Bakery Gluten-Free Vegan Stuffing Mix, Aleia’s Gluten-Free Stuffing Mix (Savory), Williams Sonoma Gluten-Free Stuffing Mix, Olivia’s Traditional Stuffing Mix, Mrs. Cubbison’s Herb Seasoned Stuffing Mix, Pepperidge Farm Herb Seasoned Classic Stuffing
Keyword Italian Seitan dressing, Italian Seitan stuffing, semi-homemade vegan stuffing, vegan holiday dressing, vegan holiday stuffing