"Create a gluten-free, dairy-free, nut-free, shellfish-free, corn-free Irish Cottage Pasties recipe for 3 servings household size 3, using imperial units, minimal processing, low-inflammation friendly, beginner-friendly, and quick/easy within 15-30 minutes active time if possible. Keep the comforting cottage pie flavors with ground beef, potatoes, carrots, celery, mushrooms, peas, thyme, sage, and a freezer-friendly pastry. Include a sauce option if appropriate, but do not use dairy, nuts, corn, or gluten. Make it accurate and safe, with clear ingredients and steps."