Grill vegetables until tender. Season with salt and pepper. Alternately they can be roasted in the oven to.
In the meantime, bring quinoa and 2cups of water to a boil in a small saucepan. Reduce heat to medium-low, cover and cook for 15~20 minutes or until tender. Season with salt.
To serve, divide the quinoa and vegetables among 4 bowls. Top each with chimichuri and garnish with sliced avocado.