Add the milk, flour, butter and salt to the blender cup. Wisk or Blend for about 1 minute until smooth and the consistency of whipping cream.
Add the beaten egg. Wisk or Blend for another minute until well combined.
Spinkle the raspberries with the sugar. NOTE: Do not do this early. It will cause the raspberries to masticate, making them unusable.
Spoon 1 tablespoon of the batter into 6 (SIX) of the muffin tins. If using a 7 cup muffin pan, leave the centre cup empty.
Add 3 rapsberries to each tin with batter.
Cover each of the cups with raspberries with 1.5 tablespoons of batter.
Using the Bake function, set the air fryer oven to 400 F for 15 minutes. Let it preheat.
When the "Add Food" alarm goes off, put the popovers on the rack on the bottom rung.
When done, very carefully open and shut the door. If you are not careful, the popovers will collapse.
Using the Bake function, set the air fryer to 300 F for 20 minutes. Ignore the "add food" notice.
When done, remove the popovers and let cool before eating.