
Finely slice the red onions, I like to do this in my food processor using the slicer attachment which takes seconds but you can also finely slice them with a knife.
Add the onions and the sugar to a large saucepan and cover with a lid. Cook on a medium heat for 10 minutes until soft.
Remove the lid and add the red wine, red wine vinegar, spices, bay leaf and a pinch of salt. Stir to combine then continue cooking until soft and sticky (there should be no liquid left).
Leave the onions to cool completely.
Cut the ciabatta into slices and drizzle with olive oil. Char-grill the crostini on a hot griddle pan.
Top with the cooled red onion chutney and some gorgonzola cheese then serve.