Bring water, rinsed quinoa and salt to a boil over a medium heat. Reduce heat to low, cover and cook 15-20 minutes or until quinoa is light and fluffy. Turn of heat and cover for 5 minutes. Fluff with a fork. Make the quinoa several hours ahead of time and chill until needed.
Toss gently with pesto to coat, add remaining ingredients, toss. Season to taste with salt, pepper and lemon juice