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1
Mix 1/2 cup of oil with the garlic, lemon juice, cumin, cardamom, Aleppo pepper (or crushed red pepper), 1 t. of black pepper and 1 1/2 T. of salt.
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2
Set the lamb on a rimmed baking sheet and coat it with the marinade. Cover and refrigerate overnight or up to 3 days. The longer it marinates, the more flavorful and tender the meat.
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3
On the day of grilling, you can go ahead and make the Yogurt-Tahini Sauce:.
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4
Blend the tahini paste, lemon juice and olive oil, in a food processor, until smooth. Add the yogurt and blend the mixture completely. Scrape the tahini sauce into a bowl; stir in the cumin and pepper. Season with salt, to taste. Garnish with parsley.
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5
Preheat a grill - medium-high heat.
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6
In a large skillet, heat 1 T. of oil over medium-low , and add the bell peppers. Cover and cook for about 10 minutes, stirring occasionally. Season with salt and pepper to taste. Transfer this to a serving bowl.
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7
Heat the remaining 1 T. of oil in the same skillet and add the onions. Cook over medium heat, stirring occasionally until the onions are lightly browned - about 10 minutes. Season with salt and pepper to taste. Tranfer the onions to a different serving bowl.
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8
Grill the leg of lamb over medium-high heat, turning often, until an instant read thermometer (inserted into the thickest part of the meat) reads 130 degrees F. for medium-rare. This should take approximately 25 minutes.
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9
Transfer the lamb to a cutting board and let it rest for about 10 minutes. This is very important! Then, thinly slice the lamb across the grain and serve with the peppers, onions, yogurt-tahini sauce and pita bread.
