Trim most of the stems from the parsley. Place in a food processor and pulse until it is chopped.
Peel the cucumbers; cut them lengthwise and scoop out the seeds. Chop.
Chop the green onions, mint, and bell pepper. Cut the tomatoes in half.
In a bowl, mix the quinoa, bell pepper, onions, mint, tomatoes, cucumber, and parsley.
Squeeze juice from the lemons into the salad and stir.