Preheat oven to 350 degrees. Spread pecans on a rimmed baking sheet, and bake until lightly browned, 4 to 6 minutes.
In a large bowl, combine celery, apple, grapes, vinegar, and oil. Season with salt and pepper, and toss to combine. Garnish with celery leaves.
I love this recipe, too! I remember making it last fall, and I am so glad I found it again. It is crunchy and just delicious. Enjoy it!
This dish was a HUGE hit at my sister-in-law's "rehearsal cookout" - the night before her wedding. Even my husband's Aunts loved it and they're AWESOME cooks. I'll definitely be making the recipe again and again. Thanks!