Preheat oven to 200 degrees celsius (fan-forced).
Place carrot, zucchini and onion into the Thermomix bowl. Grate for 2 seconds, Turbo function, and repeat until the mixture is finely grated (you may need to scrape down the sides of the bowl).
Place the grated vegetables into a strainer and squeeze out any excess liquid.
Add the grated vegetables, sausage mince, chicken mince, garlic, tomato sauce and Worcestershire sauce to the Thermomix bowl. Mix for 15 seconds, REVERSE, Speed 5 or until completely combined.
Cut one sheet of defrosted puff pastry in half.
Whisk the egg. Using a pastry brush, lightly brush the egg mixture down one long side of each pastry half. This seals the pastry edges together when rolled up.
Place 1/12th of the sausage mixture in a long thin line down the opposite side. Roll the sausage rolls into a long thin roll.
Make sure the joined pastry seam is facing down. Cut each roll into 4 pieces.
Brush each sausage roll lightly with the egg mixture. Sprinkle with sesame seeds or black poppy seeds.
Place the sausage rolls on to non-stick baking trays.
Cook in the oven for 25-30 minutes or until the pastry is golden and puffed and the mixture is cooked through.