Pork rib with red onions

1/heat the 2/3 of the fat in an iron cast casserole and then put the ribs in it, season and brown them during 5 minutes obn each side, then pour the young onions, make the heat lower, cover the cassrole with a lid and keep cooking during 20 minutes. Then take the casserole out of the hob and keep like that, still covered
2/during the cooking of the meat, pour the remaining fat into a deep pan, pour the red onions already sliced, season them, cover with a lid and let them gently swear without colour during 15 minutes, then add the vinegar and continue cooking during 5 minutes then take the pan out of the hob, still covered
3/cook the potatoes in oil in a casserole during 10 minues, season, add some fresh thyme, add 5 centiliter water, cover for steaming

Presentation:
on each nice dish, put a rib in the middle, top with a spoonfull of red onions then with 1 of the young onions. Put a little sauce from the cooking of the ribs (take the fat off before) around it and serve the potatoes in a separate dish