Add 2 TBSP olive oil to a large skillet or saucepan over medium heat.
Once warm, add cubed sweet potato and cook 7-10 minutes, stirring intermittently until the sweet potatoes have almost cooked through. Remove from the pan and set aside.
Add remaining 1.5 TBSP olive oil, sliced onions, garlic and celery and sauté until the onions turn translucent (4-5 minutes), stirring intermittently.
Add the ground beef along with the dried basil, oregano, thyme and rosemary and cook until meat begins to brown.
Add coconut aminos or nomato sauce and stir to combine.
Add chopped kale in batches, stirring to incorporate and wilt slightly between each addition. Taste mixture for salt and adjust if necessary.
To prepare the AIP dairy-free “cheese” sauce, combine coconut milk, apple cider vinegar, dried thyme, garlic powder, sea salt and optional turmeric in a small saucepan over medium heat. In a small bowl, mix together tapioca starch and water to make a slurry. Once coconut milk mixture has reached a rolling boil, add in slurry and whisk continuously until mixture begins to thicken.
Place beef and kale mixture into an 8×8 casserole dish and top with “cheese” sauce. Broil on high for 3-4 minutes, monitoring closely to ensure the top doesn’t burn.**
