In a large saucepan, combine stock and quinoa; bring to a boil. Reduce heat; simmer, covered, 15-20 minutes or until liquid is almost absorbed. Remove from heat., Meanwhile, in a 6-qt. stockpot, heat oil over medium heat. Add sweet potatoes and shallots; cook and stir 5 minutes. Add apples; cook and stir 6-8 minutes longer until potatoes and apples are tender., Stir in wine and salt. Bring to a boil; cook, uncovered, until wine is evaporated, about 1 minute. Stir in black beans and quinoa; heat through.