- Preheat oven at 350F.
- Peel the garlic, and slice each clove lengthwise in three pieces. Poke holes in the meat in several places. Push the garlic in the holes.
- Rub the meat first with the lemon, then with the margarine and the herbs, salt and pepper.
- Put the thermometer in the thickest part, so that the tip is not too close to the bone. Put the lamb leg on a rack, in a baking pan. Roast until the thermometer shows 77C. Rule of thumb: Calculate about 45 minutes of oven time per kilo of meat.