In a saucepan, bring water to a boil and add the rinsed quinoa.
Reduce the heat, cover, and simmer for about 15 minutes until quinoa is fluffy and water is absorbed.
Allow quinoa to cool for a few minutes before transferring it to a large bowl.
Add sauerkraut, bell pepper, cucumber, carrot, red onion, and parsley to the bowl with quinoa.
In a small bowl, whisk together olive oil, apple cider vinegar, and Dijon mustard. Season with salt and pepper.
Pour the dressing over the salad and toss gently to combine all the ingredients.
Chill in the refrigerator for at least 30 minutes to let flavors meld before serving.