Sweet Potato Lasagna

Sweet Potato Lasagna
via Healthilinguist 

2 sweet potatoes, sliced ¼” thick lengthwise
4 zucchini, sliced ¼” lengthwise 
1 ½ lbs grass fed ground beef
1 large onion, chopped
4 cloves garlic, minced
1 cup tomato purée
2 tbsp coconut oil or extra virgin olive oil + extra for brushing
1 tbsp dried oregano OR fresh, chopped
Pinch of sea salt
Pinch of fresh cracked pepper
1 tsp garlic powder (optional)

For the parsnip layer:
1 lb parsnips, peeled & sliced
1 tbsp coconut oil or extra virgin olive oil
1 clove garlic, minced
½ cup pecorino romano (optional)
1 cup coconut milk
Pinch of sea salt
Dash of paprika