In a small pot, combine quinoa, water and a pinch of salt. Cover, bring to a boil, reduce heat to low and cook for 12 minutes. Remove from the stove, let stand for 5 minutes and fluff with a fork. Or check out Instant Pot quinoa.
Transfer quinoa to a large mixing bowl and add tomatoes, cucumber, parsley, mint, onion, olive oil, lemon juice, salt and pepper.
Gently stir salad with large spoon to combine. Serve cold.
Notes
Store: Refrigerate leftovers covered for up to 24 hours.
Make ahead: Add quinoa and all veggies to a large bowl and cover tightly. In a small bowl, whisk olive oil, lemon juice, salt, pepper and cover. Refrigerate up to 2 days. Combine before serving.
No need to rinse quinoa: It comes pre-washed but you can if you wish.
Don't use food processor for herbs: It bruises parsley and mint, making them mushy. Also veggies are best to be chopped.
The easiest way to chop parsley: Hold it in a bouquet on a cutting board and chop with a sharp chef's knife. After go over one more time in a different direction. We are using stems but you can leave them out by shaving off the leaves with a knife while holding onto a bouquet. Then chop.