Cook quinoa according to package directions then set aside to cool.
For the Lemon Vinaigrette: combine all ingredients in a jar with a tight fitting lid or bowl then shake or whisk to combine.
Combine cooled quinoa with red onion, orange segments, avocado, beans, pomegranate arils, corn, cilantro, salt and pepper in a large bowl. Pour Lemon Vinaigrette over salad then stir to combine. Serve cold or at room temperature.