"Create a gluten-free, dairy-free, nut-free, shellfish-free, corn-free recipe named exactly: 'Alternate Recipe to Rustic Beef Skillet with Smashed Potatoes: Rustic Beef, Mushroom & Carrot Skillet with Smashed Potatoes'. Yield 6–8 servings. Use imperial units only. Keep it beginner-friendly, quick/easy (15–30 min where possible), minimal processing, and suitable for a household of 3 with moderate budget concerns and low-inflammation preferences. Include the following ingredients and instructions, but ensure the recipe is safe and polished: Smashed Potatoes with 3 pounds baby Yukon Gold potatoes, 3 tablespoons kosher salt divided, 2 tablespoons avocado oil or olive oil; Beef Skillet with 2½ pounds ground beef, 16 ounces cremini or button mushrooms sliced, 1½ cups celery finely diced, 2 tablespoons olive oil, 2 tablespoons coconut aminos, 2 cups unsalted beef broth (gluten-free, corn-free), 2 teaspoons dried thyme, ½ teaspoon dried rubbed sage, ½ teaspoon dried marjoram (or an additional ½ teaspoon thyme if preferred), 2 tablespoons arrowroot powder, 4 tablespoons cold water, 2 cups carrots cut into thin coins or half-moons, 2 tablespoons chopped fresh parsley, 2 teaspoons lemon juice optional. Make sure the instructions are clear and concise, and include any necessary notes for draining fat, mashing potatoes rustic-style, and thickening the sauce with arrowroot."