Grate butternut squash in a food processor or by hand. You should have roughly 6 cups. Set aside.
Sauté red onion in a pan with a teaspoon or two of olive oil over medium heat for 8 - 10 minutes until soft, if desired. Set aside.
In a large mixing bowl, combine chickpea flour, chopped parsley, cumin, salt and pepper. Toss to combine.
Add onion, garlic, egg and butternut squash to the bowl. Toss for a few minutes until onions and butternut squash start to give off a little liquid and form a light batter with the chickpea flour.
Preheat air fryer to 375°F / 190°C. Line the baking pan (or basket) with parchment paper and lightly coat with cooking spray.
Use a cookie scoop or 1/4 cup measure to portion out fritters. Gently form them into patties, if desired, then place on lined pan.
Lightly coat the tops with cooking spray and cook for 10 minutes. (Check on them during cooking to make sure they aren't getting too brown)
Flip butternut fritters over and cook for an additional 5 minutes. Cool for a few minutes before serving.