01 - Place sliced apples in a bowl and toss thoroughly with lemon juice to coat evenly and prevent oxidation browning.
02 - Heat dry skillet over medium heat. Add chopped walnuts and toast for 3-5 minutes, stirring frequently until fragrant and lightly browned. Remove from heat and set aside to cool completely.
03 - In small bowl, whisk together olive oil, apple cider vinegar, Dijon mustard, honey, salt, and pepper until fully emulsified and smooth.
04 - In large mixing bowl, combine prepared apples, sliced celery, minced shallot, and cooled toasted walnuts.
05 - Pour prepared dressing over salad mixture. Toss gently but thoroughly to ensure all ingredients are evenly coated.
06 - Transfer to serving platter and garnish with chopped parsley if desired. Serve immediately for optimal freshness and crunch.