Roasted Vegetable & Feta Cheese Quinoa Bake

"There's an array of Mediterranean flavors and feta cheese baked into this healthy quinoa casserole! A delicious and healthy vegetarian dinner that will convince anyone to love the superfood quinoa. It's very flexible - I fill it with roasted peppers, onions and olives but you could definitely add some tomatoes, eggplant or zucchini if you have them around. The feta cheese keeps everything moist and super delicious. I personally serve a big bowl of this as a main dish but you could also make it as a side dish."