Oven on at 500F (fan on), cube butter and freeze
Use 1 strip of bacon to render the fat slowly, save this strip (crumbled) for garnish
In bacon fat, saute onions 2 min then add chopped bacon
Add carrot, celery and garlic, saute 3-4 min
Add mushrooms, saute 1 min
Add spices + parsley stems + salt, saute 3min
Add wine + beef stock reduce, until almost dry, but still moist
Flame off, add breadcrumbs
Save this pan, do not wash yet!