It is recommended to increase the cooking time by 5% for every 1,000 feet above 2,000 feet. Since this recipe just needs 1 minute of active cooking time, start by doubling the cooking time to 2 minutes and then test to see if the quinoa is cooked to your liking. You'll also want to increase the liquid by 1-2 tbsp and make sure you perform the full 10-minute natural release before doing a quick release.