Preheat your oven to 400°F (200°C) and lightly grease a 9x9 inch baking dish with a small amount of olive oil.
In a large skillet over medium-high heat, add the olive oil and ground turkey, cooking and breaking it apart with a spatula until fully browned and cooked through.
Wash and dice the Yukon Gold potatoes into small half-inch cubes, leaving the skin on for extra texture and nutrients.
In a medium bowl, toss the potato cubes with melted ghee, sea salt, black pepper, garlic powder, onion powder, and smoked paprika until evenly coated.
Spread the seasoned potatoes in a single layer on a parchment-lined baking sheet and roast for 18 to 20 minutes until they are fork-tender and slightly crisp.
In a large mixing bowl, combine the browned turkey, roasted potatoes, cooked white rice, maple syrup, and tamari, stirring gently until the glaze is well distributed.
Transfer the mixture into the prepared baking dish, pressing down with the back of a spoon to create an even layer.
Sprinkle the shredded cheddar cheese evenly over the top of the casserole.
Bake for 10 to 12 minutes until the cheese is completely melted and the edges are bubbling.
Remove from the oven and allow the casserole to rest for 5 minutes to set before serving.