Roughly chop the carrot and onion. Put in a food processor and pulse with the herbs and stock powder
Put mince, sausage meat, breadcrumbs and carrot mixture in a large mixing bowl. Mix together thoroughly - best with you hands. I always put disposable cooking gloves on because the mince is usually really cold!!
Lay three sheets of pastry out on preparation space. Cut each of them in half, so you have 6 rectangles.
place enough filling along the long edge of each rectangle, so that you can roll them and have about 1cm overlap to hold the sausage roll together.
Cut each long roll into 6 pieces - these are the perfect two bites (or one for hungry teenagers) Brush with beaten egg if you want a really golden crunch on your pastry.
Arrange one dozen in the basket of your Air Fryer, Turn onto 180, and set timer for 12 minutes. Press start and pour yourself a glass of wine while it does all the work for you.
Repeat the last step twice more to make all 36.
Notes
If you are making a huge amount for entertaining, I've found it a good idea to place the Air Fryer under your stove top extract fan.