Rinse quinoa well (quinoa tastes bitter if not well rinsed). Bring 3 cups water or broth to a boil. Add rinsed quinoa and bring back to boil. Simmer uncovered for about 15 minutes until liquid is well absorbed. Transfer to large bowl with a small amount of olive oil to prevent sticking, and allow to cool. Meantime, mix together remaining oil, vinegar or lemon juice, parsley, and garlic in a small bowl. Add veggies to quinoa and toss well with dressing mixture, dill, salt and pepper. Chill before serving.