1. Light a fire well over to one side of your grill, using enough coals to fill a large shoebox. When the fire has died down and the coals are covered with white ash, you're ready to cook.
2. Combine the spice rub ingredients in a small bowl and mix well.
3. Coat the thighs generously with the spice rub, pressing gently to be sure it adheres, then arrange them, skin side down, on the side of the grill away from the coals, being careful that none of the meat is directly over the coals. Put the lid on the grill with the vents open one-quarter of the way and cook for about 1 hour, adding a handful of fresh charcoal and flipping the thighs over after 30 minutes. To check for doneness, cut into one of the thighs at its thickest point; there should be no redness near the bone.
4. While the chicken is on the grill, combine the ketchup, maple syrup, and lemon juice in a small bowl and mix well. Baste the chicken with the sauce during the last 10 minutes of cooking, and serve the remaining sauce along with the smoked thighs.
Excerpted from Grill It!: Recipes, Techniques, Tools by Chris Schlesinger and John Willoughby (Dorling Kindersley, 2008). Copyright 2008 Dorling Kindersley Limited. Text copyright 2008 Chris Schlesinger & John Willoughby. All rights reserved.
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