How to Make It
In a fine mesh sieve, rinse the quinoa under cold water and strain. Combine the quinoa, water and salt in a medium saucepan. Bring to a boil, cover, reduce the heat, and gently simmer for 12-15 minutes. Remove from heat and transfer the quinoa to a strainer to drain out the remaining cooking liquid. Fluff the quinoa with a fork, spread it onto a baking sheet in one even layer and refrigerate until it is has cooled about 25 minutes.
In a large bowl, whisk the lemon juice, honey, and olive oil; season with salt and pepper. Add the chilled quinoa, sliced apples, celery root, arugula, and pecans and toss well to combine. Taste to adjust the seasoning with salt and pepper. Serve immediately.