Wash the quinoa a couple of times until the water runs clear.
Add the quinoa, water and stock cube to a pan on med-high heat.
Once it begins to boil, reduce the heat to low, cover and simmer for 10 minutes or until cooked.
While the Quinoa is cooking, in a separate pan, heat the olive oil and once hot, add the onions and saute for a minute.
Add the garlic and saute for a minute.
Add the capsicum and tomatoes and sautee for 4-5 minutes or until you reach your desired level of vegetable crunchiness.
Season with salt and Mexican Seasoning*
Add the boiled corn, olives and quinoa and mix well.