"Create a gluten-free, dairy-free, nut-free, shellfish-free, corn-free Autumn Harvest Pasties recipe for 3 servings household scaled from the provided concept. Keep it beginner-friendly, quick/easy where possible, minimal processing, low-inflammation leaning, and use imperial units only. Include a savory beef-and-vegetable filling with butternut squash, Yukon Gold potatoes, mushrooms, cannellini beans, and sun-dried tomatoes. Provide clear ingredients and steps, plus one optional sauce that also avoids dairy, gluten, nuts, shellfish, and corn. Avoid any ingredients containing gluten, dairy, nuts, shellfish, or corn."