1large green onion - thinly sliced (about 3 tablespoons), or 2 small/medium green onions
2tablespoonschopped fresh dill
1/2teaspoonkosher salt - plus additional to taste
1/2teaspoonblack pepper - plus additional to taste
1/8teaspoongarlic powder - plus additional to taste
1tablespoonapple cider vinegar
5tablespoonshot water - plus additional as needed
Bib or romaine lettuce
Toast the nuts: Preheat the oven to 350 degrees F. Spread the nuts in a single layer on an ungreased baking sheet. Bake for 6 to 8 minutes (for almonds) or 8 to 10 minutes (for walnuts) until crisp, fragrant, and toasted. Set a timer and do not walk away from the oven during the last few minutes, as nuts can burn the moment you stop watching. If using almonds, transfer to a small bowl; if using walnuts, transfer to a cutting board, then let cool a few minutes and roughly chop.
Place the diced chicken, grapes, celery, green onions, dill, and toasted nuts in a large bowl.
In a small bowl, add tahini, salt, pepper, and garlic powder. Whisk to combine. Add the apple cider vinegar, then the hot water, and stir until smooth. Add additional hot water 1 tablespoon at a time, until you have a smooth, pourable sauce that seems like a thick dressing.
Pour the tahini mixture over the chicken mixture and toss to coat. Taste and add additional salt and pepper as desired. If time allows, refrigerate for 2 hours. Serve piled inside lettuce cups and enjoy!