Preheat the oven to 350ºF. Line 2 baking sheets with foil and spray with cooking spray.
Rinse the chicken pieces and pat dry with paper towels.
Combine the onions, parmesan, paprika, salt, and pepper in a blender and process until finely ground. Pour the mixture into a large plastic food storage bag.
Beat the eggs in a shallow bowl with the hot sauce. Dip 1 piece of the chicken into the egg mixture to coat well. Drop the chicken into the bag and shake, coating well with the onion mixture. Place on the prepared baking sheet and continue with the rest of the chicken pieces. Spray the chicken with cooking spray and bake for 45-50 minutes or until golden brown and an instant read thermometer registers 165ºF.