Preparation Bring sugar and vinegar to boil in heavy small saucepan, stirring until sugar dissolves. Remove from heat and set aside. Heat oil in large saucepan over medium heat. Add cumin, fennel, and mustard seeds; stir until mustard seeds pop, about 1 minute. Add onion; cook until beginning to brown, stirring constantly, about 6 minutes. Add ginger and chile; stir until chile softens, about 2 minutes. Add vinegar mixture, 3/4 cup water, all cranberries, orange peel, and salt. Simmer until juices thicken, stirring often, about 20 minutes. Cool, cover, and chill. DO AHEAD: Can be made 3 days ahead. Keep chilled.
Preparation Bring sugar and vinegar to boil in heavy small saucepan, stirring until sugar dissolves. Remove from heat and set aside. Heat oil in large saucepan over medium heat. Add cumin, fennel, and mustard seeds; stir until mustard seeds pop, about 1 minute. Add onion; cook until beginning to brown, stirring constantly, about 6 minutes. Add ginger and chile; stir until chile softens, about 2 minutes. Add vinegar mixture, 3/4 cup water, all cranberries, orange peel, and salt. Simmer until juices thicken, stirring often, about 20 minutes. Cool, cover, and chill. DO AHEAD: Can be made 3 days ahead. Keep chilled.