Sauté onion and garlic in olive oil until browned. Add hamburger, cook until browned. Add tomato sauce, tomatoes, salt and oregano. Simmer. Preheat oven to 350 degrees. Put layer of this sauce in bottom of 13x9x2-1/2" baking dish, following with layer of quinoa and layer of cheese. Repeat two more layers ending with sauce an extra Parmesan cheese on top. Bake about 35 minutes.