Melt butter in a large casserole dish. Brown meat on each side and reserve.
Fry onions, add meat. Spread flour and coat meat. Add red beer, bouquet garni, salt, pepper and pressed garlic. Cover (mandatory) and leave to cook for 2 hours on low heat.
Crumble gingerbread. Add in casserole dish with Dijon mustard and brown sugar. Leave to cook for another hour.
Serve with fresh pasta or French fries. Personally I like it more with fresh pasta; but this is your choice to make :-).