In a large mixing bowl, combine your leftover mashed potatoes, shredded cheese, flour, egg, and seasonings. Stir well until everything is evenly mixed together and no dry flour remains.

Shape the creamy mixture into small golf ball-sized balls or patties. Place them on a parchment-lined baking sheet, spacing them evenly for better cooking.

Preheat your oven to 400°F (200°C). This ensures that your cheese puffs will cook evenly and become delightfully crispy.

Bake the shaped puffs for 20-25 minutes. Keep an eye on them until they turn golden brown and crispy on the outside, which is a sure sign they’re ready!

Allow the puffs to cool slightly before serving. They’re best enjoyed warm and can be optionally garnished with fresh herbs for added flavor and aroma.