Pour a drop of oil into a large non-stick pan and add the onions, mushrooms and pumpkin: mix, add salt, pepper, cover and cook for 5 minutes over high heat.
Add the smoked bacon and cream, mix, cover again and continue cooking 5 minutes more.
Turn off and let cool.
In the meantime, cut out 16 circles from the slices of cheese to form the eyes of our monsters and slice the olives to get the pupil.
Unroll the shortcrust pastry discs and use them to line the base of 8 tart molds.
Knead the scraps gettig a ball, roll it out with a rolling pin and cut out many strips that will form the "bandages" of our mummies / monsters.
Fill the base of the pies with the pumpkin filling and cover with the strips of shortcrust pastry in an irregular way.
Let it rest in the refrigerator while the oven reaches temperature: 200 ° C ventilated mode.
Cook the monstrous pumpkin pies for 25 minutes.
Remove from the oven, allow to cool, decorate with eyes and serve at room temperature!