Heat a frying pan to medium heat with a drizzle of olive oil.
Pan fry the sausages, turning regularly, for around 8-10 minutes or until just cooked.
Remove sausages from the pan and set aside to cool a little.
Preheat oven to 190°C and line a baking tray with baking paper.
Place the puff pastry sheet on a clean chopping board and, using a sharp knife, cut into strips approximately 5mm wide.
Brush each sausage with some of the tomato and ketchup mix then wrap with the pastry strips until covered (leaving a gap near the top for the eyes, as pictured).
Place the sausages on the tray and brush the pastry with a little milk.
Bake for 20-25 minutes until the pastry is golden.
Decorate with edible eyes (available from baking retailers) or for a home-made option, add a dot of mustard and a smaller dot of tomato sauce.
Serve with tomato sauce for dipping!