Peel and wash the potatoes and cut into large cubes. Cut mushrooms into slices, halve oyster mushrooms. Clean the chanterelles. Wash and clean spring onions. Cut the upper green into rings.
Peel and finely chop the garlic. Heat the oil in a pan, fry the whole spring onions in it, remove. Fry the potato cubes in the oil over medium heat for about 10 minutes, turning them over. Add fat, garlic and mushrooms and fry for another 10 minutes.
Add onions and bacon, fry briefly, season everything with salt and pepper. Set aside about 1/4 of the fried potatoes for garnishing.