"This is a flavorful whole grain rice and black bean dish that can stand on its own as a vegetarian dish or can be added to with any sort of meat. You can use any rice mixture (brown, wild, long grain, red), if desired. You can use any mushroom in place of the shiitake mushrooms."
Combine vegetable broth, wild rice, brown rice, and olive oil in a saucepan; bring to a boil, reduce heat to low, cover with a lid, and simmer for 20 minutes. Stir balsamic vinegar, sherry, garlic, salt, black pepper, and cardamom into rice; cover with a lid and continue simmering until flavors start to combine, about 10 minutes.
Stir black beans, mushrooms, cranberries, and parsley into rice mixture; continue cooking over low heat until rice is tender and mixture is hot throughout, 10 to 15 minutes more.