Wash your zucchini.

Peal the potatoes.

Preheat the oven to 425 F.

Using a mandolin slice the zucchini and the potatoes all the same size. 

Coat the zucchini with 1 tbsp olive oil, 1/2 tsp oregano and 1/4 tsp garlic powder. Salt and pepper.

Coat the potatoes with 1 tbsp olive oil, 1/2 tsp oregano and 1/4 tsp garlic powder.  Salt and pepper.  

Layer on a slant in a good round oven dish alternating the potato and the zucchini. Start with a large outer circle and work your way to the centre. ( see video)

Once completed, salt and pepper.  Drizzle with olive oil, sprinkle with the parmesan cheese and drizzle with olive oil again.

Put in oven at 425 F for 40 minutes.  After this amount of time,  lower to 375 for another 50 minutes.  This will crisp up the potatoes nicely.  

Pour some Marinara sauce over it at the end and more parmesan cheese.

Let sit for 20 minutes before serving.