01 - Preheat oven to 400°F. Line a baking sheet with parchment paper.
02 - Toss cherries with 1 tablespoon olive oil and a pinch of salt. Spread in a single layer on the baking sheet and roast for 15-18 minutes until juicy and slightly caramelized. Cool slightly.
03 - Bring water and 1/4 teaspoon salt to a boil in a medium saucepan. Add rinsed quinoa, reduce heat to low, cover, and simmer for 15 minutes. Remove from heat and let stand, covered, for 5 minutes. Fluff with a fork and cool to room temperature.
04 - In a large bowl, whisk together olive oil, lemon juice, orange juice, honey, Dijon mustard, salt, and pepper to make the vinaigrette.
05 - Add cooled quinoa, roasted cherries, pistachios, mint, arugula, and red onion to the bowl. Toss gently to combine with the vinaigrette.
06 - Taste and adjust seasoning if needed. Serve immediately or chill for 30 minutes for deeper flavor.