Chop the bacon, the mushrooms and the spring onions.
Fry the sage leaves in butter for some minutes (3-4 min).
Add the chopped bacon & the spring onions & mix (about 5 min).
Discard the sage leaves.
Add the chopped mushrooms, mix & fry for some minutes (about 5-6 min).
Add salt & pepper to taste.
Add some cream (2-3 tbsp) - if you like.
Cook the tortellini (about 2 min in boiling water) & drain them. (Don't forget to start heating a pot filled with water when frying the vegetables!)
Arrange the tortellini & the mushroom mess on 2 plates.
Add generously freshly grated parmesan - if you like.
Serve at once.