Sweet Potato Quinoa Gratin

First, preheat oven to 350F and spray a large, deep baking dish with nonstick cooking spray.Next, cook your quinoa. In a medium sized sauce pan, bring â…“ cup of quinoa and â…” cup of vegetable broth to a rolling boil. Cover and reduce heat to low and let cook for about 20 minutes or until all of the water is absorbed and the quinoa is fluffy. Set aside.Next, prepare your potatoes. First, wash your red potatoes and sweet potatoes and pat dry. Next, using a sharp knife, thinly slice your potatoes as thin as you can.Then, layer the bottom of your pan with red potatoes (see photo above for how I did it). Then, drizzle with olive oil and sprinkle on salt and pepper (to taste), along with a sprinkle of cheese. Next, do the same thing with sweet potatoes, drizzle on more olive oil, sprinkle salt, pepper and cheese. Repeat until you've used all of your potatoes or until you've gotten to the top of your dish. I did about 6 layers of potatoes.Once you've layered all of your potatoes, pour about 1.5 cups of milk/cream over the top. Then, evenly spread your cooked quinoa on top and then sprinkle with more shredded cheese.Cover baking dish with tin foil and bake at 350 for 30 minutes. Then, turn the heat up to 375 and bake for another 30-40 minutes, or until the quinoa begins to brown on the top.