1 rump cap (aprox. 1.2kg)
3 kg of rock salt
4 soup spoon of butter
4 soup spoon of olive oil
1 onion (chopped)
Cover a baking tray with 1 kg of rock salt
Place the rump cap with the fat up
Cover all the meat with rock salt
Place into an oven at 200° C for 40 minutes.
Take the tray from the oven and remove the salt lawyer from the meat
Slice the rump cap and add the sauce on top.
Heat the butter and olive oil in a frypan
Add the onion and fry it for a while.