Step #1 Boil onions for 15 mins until slightly tender, allow this to cool.
Step #2 With a sharp knife remove the top inch of each onion, finely chop the removed onion & place to one side.
Step #3 Cut out a heaped tbsp from the inside of each onion, keeping the outside intact.
Step #4 Finely chop the removed onion & add it to the rest.
Step #5 Preheat oven to 400*.
Step #6 Heat the oil in a skillet & saute the garlic, sliced onion,and a little sliced rosemary until softened, then reduce the heat & add the cream & the parmesan cheese.
Step #7 Spice up.
Step #8 Wrap a slice of pancetta/bacon ,horizontally around each onion & secure by spiking a twig of rosemary through it.
Step #9 Place onions on a baking tray & spoon onion mixture on each onion.