Press the garlic and mix it with all the ingredients (except for the meat, of course) to a paste (should be about the consistency of mustard). Use fresh rosemary if possible. Then spread this paste on one side of the square and put it in the oven! 200 ° circulating air
Then depending on the thickness of the meat 1 1/4 to 1 1/2 hours. If a meat thermo is available, it is advisable to cover the whole thing with aluminum foil when the lamb temperature is reached. Otherwise, as per feel, cover before it turns black!