Preheat the oven to 190° C w/ fan.
Cut the butternut into halves, cut off the stems, scrape out the seeds & the mushy pulp w/ a spoon.
Add some olive oil & rub it all over the surface.
Place the butternut halves on a baking tray lined w/ baking parchment.
Let it bake for about 50 min.
In the meantime chop the onion & the bacon.
Fry onion & bacon pieces gently in olive oil for about 15-20 min until soft (but not burnt!).
Mix crushed goat cheese & Greek yoghurt.
When the butternut is soft (make the famous test w/ the wooden pin!) let it cool for some minutes.
As soon as possible spoon the soft butternut pulp in a bowl.
Add the goat cheese yoghurt mix & mix thoroughly w/ a spoon.
Finally add the bacon onion mix & mix thoroughly - once again w/ a spoon.
Add salt & pepper to taste!
Serve at once or let it rest in a casserole for reheating.