In a small bowl, mix together the garlic, onion, rosemary, thyme, olive oil, salt, and pepper.
Rub the mixture all over the lamb leg.
Put the leg of lamb in a roasting pan and lay the bacon slices over the top.
Bake in the preheated oven for 20 minutes per pound, or until the internal temperature reaches 145°F (63°C).
Let the lamb rest for 10 minutes before carving.
Interesting Facts
The “dirty piggy-back” cooking method is an old-fashioned way of cooking a leg of lamb. The bacon helps keep the lamb moist and flavorful while it cooks.
Lamb is a great source of protein, zinc, and iron.