• 1 cup quinoa, rinsed well
• ½ teaspoon kosher salt plus more
• 2 tablespoon fresh lemon juice
• ½ cup extra-virgin olive oil
• Freshly ground black pepper
• 1 large English hothouse cucumber or 2 Persian cucumbers, cut into ¼" pieces
• 1 pint cherry tomatoes, halved
• ⅔ cup chopped flat-leaf parsley
• ½ cup chopped fresh mint
• 2 scallions, thinly sliced