Season the roast pork with salt, pepper, paprika and rosemary. Heat the clarified butter and fry the meat well on all sides, remove and place in a roaster. Wash the spring onions, remove the outer shell if necessary, cut into quarters, leave 3 cm from the leaf base. Steam the onions in the meat stock, deglaze with white wine and reduce. Add the bouillon and fry the doubts with the liquid.
Braise in a hot oven at 170 ° C top / bottom heat for about 1 hour. Should the liquid boil down, add a little more bouillon.
Cut the roast into slices and arrange on a platter. Mix the sauce with the sour cream and serve with the meat.
Tip: New, fried potatoes go well with roast pork with spring onions.