Rinse the quinoa thoroughly under cold water.
Add quinoa and water to a medium saucepan.
Bring to a boil, then reduce heat to low.
Cover and simmer for about 15 minutes until the water is absorbed.
Remove from heat and let the quinoa sit uncovered for 5 minutes. Fluff with a fork and allow it to cool.
Pit and halve the cherries.
Roughly chop the pistachios.
In a large mixing bowl, combine the cooled quinoa, cherries, pistachios, red onion, and chopped mint.
In a small bowl, whisk together apple cider vinegar, lemon juice, salt, and pepper.
Pour the dressing over the salad and gently toss to combine.
Fold in baby arugula if desired.
Taste and adjust seasoning as needed.
Serve immediately or chill before serving for an even more refreshing Cherry Pistachio Quinoa Salad.