Prep the dressing: In a medium bowl, whisk together the Greek yogurt, mayonnaise, Dijon, lemon juice, and lemon zest.
Season with a pinch of salt and pepper. The mixture should taste bright and a little tangy.
Add the mix-ins: Stir in the celery and green onions. If using nuts or grapes, fold them in now so they’re evenly distributed.
Fold in the chicken: Add the chopped or shredded chicken and mix until it’s well coated but not mashed.
You want distinct pieces of chicken for the best texture.
Add the herbs: Gently fold in the chopped basil and parsley. Taste and adjust with more salt, pepper, or lemon juice. The basil should be fragrant and fresh without overpowering.
Toast the bread: Lightly toast your bread or warm your rolls.
This adds crunch and helps prevent sogginess once assembled.
Assemble the sandwiches: Layer lettuce or spinach on the bottom slice to create a barrier. Spoon on a generous amount of chicken salad. Add optional toppings like cucumber, tomato, or avocado.
Cap with the top slice.
Pack for lunch: If taking to work, wrap the sandwich tightly or pack the chicken salad separately with bread and greens to assemble later. Add a lemon wedge if you like a fresh squeeze right before eating.