For two people;

Fry four onions and some garlic in butter (add olive oil if there isn't enough butter) with mustard seeds and black onion seeds. When caramalised add water, some stock (I used vegetable because K is a vegetarian but I think beef may be nicest), a bay leaf, some thyme, some sage, some oregano, some white pepper and quite a bit of parsley. All of that is to taste. When it's cooked for a bit add some milk and then let it cook a bit more.