Nutty-tasting grains, such as wild rice, barley and wheat berries, make this simple side-dish pilaf so much more than the sum of its parts. Since the wild rice cooks faster than wheat berries and hulled barley, presoak the longer-cooking grains to make the cooking times compatible. If you would like to add fresh mushrooms, quickly sauté them and stir them into the cooked pilaf. Or try this flavor variation: Omit dill and substitute 1 teaspoon lemon zest for lemon juice. Stir in 1/2 cup grated Parmesan cheese just before serving.