Grilled Lamb Chops with onion

1/3 cup fresh cilantro , chopped 1/4 cup honey 2 tablespoons soy sauce 2 tablespoons cognac or 2 tablespoons brandy 3 garlic cloves , minced 3 lbs racks of[...]

1 red onion , quartered 6 tablespoons olive oil , plus more for brushing salt & freshly ground black pepper 2 lemons , cut into 8 slices each and seeded 2[...]