Cook quinoa:
Rinse quinoa under cold water in a fine-mesh sieve until the water is clear. In a medium saucepan, combine the rinsed quinoa with 2 cups water. Bring to a gentle boil, then reduce heat to low, cover, and let simmer for 12–15 minutes, or until the grains are tender and the liquid has been absorbed. Remove from heat, allow to cool to room temperature, and fluff with a fork.Make dressing:
While the quinoa cools, prepare the dressing: in a small bowl, whisk together the olive oil, apple cider vinegar, honey, and Dijon mustard. Add a pinch of salt and a few grinds of black pepper; taste and adjust seasoning as needed.Combine salad:
In a large bowl, combine the cooled quinoa, diced apple, dried cranberries, chopped parsley, and almonds if using. Drizzle the dressing over the mixture and toss gently until well combined.Chill before serving:
Refrigerate the salad for at least 30 minutes to allow flavors to develop. Serve chilled, or let it come to room temperature for 10–15 minutes before serving.