- 1/2 cup walnut pieces, minced
- 2 Granny Smith apples – peeled, cored, and minced
- 1 large sweet onion, minced
- 1/4 cup chopped fresh chives
- 1/4 cup chopped fresh parsley
- 1/4 cup raw apple cider vinegar (such as Bragg®)
- 3/4 cup extra-virgin olive oil
- 1/4 cup crumbled blue cheese
- 6 Belgian endives, separated into individual leaves
- Toast walnut pieces in a dry skillet over medium-high heat until aromatic and lightly browned, 3 to 5 minutes. Let cool to room temperature.
- Combine apples, onion, chives, and parsley in a bowl and toss well.
- Pour vinegar into a small bowl; drizzle and whisk olive oil into vinegar until emulsified. Pour dressing into apple mixture and toss to coat.
- Gently fold walnuts and blue cheese into apple mixture just before serving. Spoon filling onto each endive leaf.