Begin by gently wiping the mushrooms clean with a damp cloth.
Remove the stems carefully, finely chop them and set them aside, as they’ll be used for the filling.
Heat 1 tbsp of olive oil in a large skillet over medium heat. Add the chopped shallot and sauté for about 5 minutes, until soft and translucent.
Add chopped mushroom stems and sauté for a couple of minutes before adding the minced garlic.
Sauté the garlic for 30 seconds and stir in the salt and pepper.
Remove the pan from the heat, and stir in the chopped parsley and grated parmesan.
Spoon a generous amount of the filling into each mushroom cap, pressing lightly to pack it in.
Top each mushrooms with a pinch of grated cheddar and a piece of butter.
Set your air fryer to 375°F (190°C).
Arrange the stuffed mushrooms in a single layer in the air fryer basket, leaving a bit of space between each one for even cooking.
Air fry for about 8-10 minutes, or until the tops are golden and the mushrooms are tender. Keep an eye on them after the 8-minute mark to prevent overcooking.