With a sharp knife, score the skin on each duck breast, but don't cut through to the meat.
In a small bowl, combine the garlic, lime juice and zest, sorghum, salt and pepper. Use a small brush to paint the surface of each duck breast with the sorghum mixture and let marinate for 1 hour.
Prepare a very hot grill and cook the duck breast, skin-side down, for about 4 minutes (watch for flare-ups). Turn and continue grilling for 3 minutes, or until the duck breast is still pink in the center. To serve, slice and fan out on the plate.
In a covered casserole, heat the olive oil over medium heat and saute the onion until translucent, about 4 minutes. Add the wild rice and chicken broth, and bring to a boil. Reduce heat, cover, and let simmer for 20 minutes. Add the white rice, dried cherries, and sorghum. Cover again and cook until the rice is tender, about 20 minutes. Season, to taste, and serve.;