Pour water, salt and the quinoa in a casserole and when the water is boiling, reduce the temperature and let it simmer for 15 minutes. Cover the casserole with a lid.
Take away from the stow and mix with the olive oil and salad spices.
Peel and grate the carrot.
Cut the radishes and the olives in small pieces.
Mix all the vegetables in a bowl. Add the quinoa and mix well.