In a large bowl combine all the ingredients except the toppings.
When the quinoa is cooked, add it to the other ingredients and combine well.
Cut the peppers in half length ways and brush lightly with vegetables stock.
Fill the peppers with the quinoa mixture, place on a baking tray or dish, cover with aluminum foil and place in the oven.
Bake for approximately 50 minutes or until cooked through. If you would like the filling a little more crunchy remove the foil and cook for another 10 minutes.