Start by cooking the bowtie pasta in salted boiling water according to the package directions. Once it reaches al dente texture, drain it and rinse it under cold water so it cools down quickly and stops cooking. Set aside.
Preheat your oven to 350°F (175°C). Spread the raw almonds evenly on a baking tray. Toast them for about 5 minutes, then give them a quick stir and return them to the oven for another 5 minutes or until they turn lightly golden and smell nutty. Remove from the oven, let them cool completely, then roughly chop.
While the pasta is cooking and almonds are toasting, prepare the dressing. In a medium bowl, whisk together Greek yogurt, apple cider vinegar, oil, maple syrup, poppy seeds, and salt until smooth and creamy. Place in the fridge while you assemble the salad.
In a large mixing bowl, combine the cooled pasta, cooked chicken, halved grapes, chopped celery, diced onion, and chopped almonds.
Pour the poppy seed dressing over the mixture and gently toss everything until fully coated. Taste and adjust seasoning if needed, adding a pinch more salt or pepper depending on preference.
Serve immediately, or refrigerate for 1–2 hours in a sealed container to let the flavors blend together before serving.