Root Vegetable Gratin with Sprinkles
1/2 lb. of parsnips (2 medium-sized) 1 medium celery root (sometimes called celeriac; 3/4 lb total) 1/2 lb sweet potatoes 1 1/2 lb russet (baking) potatoes 1/2 teaspoon salt 1 teaspoon finely chopped garlic 1/2 teaspoon black pepper 1/4 teaspoon freshly grated nutmeg 1/2 cup reduced-sodium chicken broth 1/2 cup of Greek 2% yogurt 1 [...]
