How to Make It
In a large bowl, combine the garlic with 3 tablespoons of olive oil, the lemon juice, salt, pepper, dried mint and oregano. Add the lamb, toss to coat and refrigerate for at least 1 hour or for up to 3 hours.
Thread the lamb onto skewers, placing 1 fresh mint leaf between the pieces of meat. Skewer alternate pieces of onion and bell pepper and brush lightly with olive oil.
Light a grill. Lightly brush the grate with vegetable oil and grill the lamb and vegetables over a medium-hot fire, turning frequently, until the lamb is medium, about 6 minutes, and the vegetables are tender and lightly charred, about 8 minutes. Let the kebabs stand for 2 minutes, then serve with the Garlicky Tahini, lemon wedges and pita bread.