01 - Place sliced apples in a bowl and toss with lemon juice to coat evenly, preventing oxidation and browning.
02 - Heat a dry skillet over medium heat. Add walnut halves and toast for 3-5 minutes, stirring frequently until fragrant and lightly browned. Remove from heat and let cool completely.
03 - In a small bowl, whisk together extra virgin olive oil, apple cider vinegar, Dijon mustard, honey, salt, and black pepper until fully emulsified and smooth.
04 - In a large mixing bowl, add the prepared apples, sliced celery, minced shallot, and cooled toasted walnuts.
05 - Pour the emulsified dressing over the salad mixture. Use gentle folding motions to coat all ingredients evenly without crushing the apples.
06 - Transfer salad to a serving platter. Sprinkle with chopped fresh parsley if desired. Serve immediately for optimal crispness.