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1
Whisk together water, salt, and sugar in a large container until salt and sugar are dissolved. Submerge turkey breasts in brine. Place container in refrigerator and brine for 8 to 12 hours.
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2
Right before removing turkey from brine, stir together butter, garlic, oregano, thyme, rosemary, sage, marjoram, mustard, salt, pepper, lemon zest, and crushed red pepper in a small bowl.
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3
Remove turkey from brine and pat dry with paper towels inside and out. Using fingers, gently separate skin from meat underneath breasts. Spread 1/3 of herb butter under each breast. Spread remaining 1/3 of herb butter all over outside of breasts.
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4
When all the charcoal is lit and covered with gray ash, pour out and arrange the coals on either side of the charcoal grate and place a foil pan between the two piles of coals. Place wood chunk on one pile of coals. Cover grill and allow to preheat for 5 minutes.
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5
and
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6
the grilling grate. Place turkey breasts on grill grate situated over foil pan, cover, positioning top air vent opposite of wood chunk. Cook until an instant read thermometer registers 160u00b0F in the thickest part of the breast, about 1 1/2 to 2 hours. Remove turkey from grill and allow to rest, uncovered, for 20 to 30 minutes. Remove breasts from bone, slice, and serve.
