Let vanilla ice cream thaw a little and form 8 large ice cream scoops (approx. 50 g each) with an ice cream scoop former. Place on a large plate or tray and place in the freezer. Scrape the chocolate slices off the chocolate coating with a wide knife back.
Drain the cherries on a sieve and collect the juice. Stir cornflour with a little juice until smooth. Boil up the rest of the juice, cinnamon stick and sugar. Stir in cornflour and bring to the boil again briefly.
Remove the cinnamon stick and add the cherries to the hot sauce. Spread ice cream scoops in the glass bowls and pour the hot cherries over them. Sprinkle with chocolate slices and serve immediately.