In a large bowl, combine the sliced celery, diced dried apricots, crumbled Gorgonzola cheese, toasted pecans, diced shallot, and chopped parsley.

In a small bowl, whisk together the lemon juice, apple cider vinegar, extra-virgin olive oil, red pepper flakes (if using), kosher salt, and black pepper.

Pour the dressing over the salad mixture and toss gently to combine.