Heat a 12 inch cast iron skillet over medium heat.
Add bacon to the pan and cook until crispy. Remove from pan and set aside.
Keep the bacon drippings in the pan and add sweet potatoes to the pan and stir to coat with drippings. Let cook for 5 minutes, not stirring, then stir and cook for another 5 minutes.
Add garlic powder and salt to the sweet potatoes and stir then cook another few minutes until browned.
While the sweet potatoes cook, mix together the crumble topping.
Chop the bacon and add it to a medium bowl with coconut sugar, flour, pecans, butter, rosemary & thyme and stir to combine well.
Once sweet potatoes are browned, add the crumble evenly on top. Place in the oven and bake for 25 minutes.