Golden Potato Souffle

Name: Golden Potato Souffle
Ingredients: 2 tablespoons fresh bread crumbs; 2 tablespoons grated Parmesan cheese; 2 1/2 pounds yukon gold potatoes, peeled and cut into 1 cubes; 1 1/4 cups 1% low-fat buttermilk or soured milk (see hint); 3 ounces reduced-fat cream cheese, cubed; 2 tablespoons butter-flavored sprinkles; 2 cloves garlic, halved; 1/2 teaspoon baking soda; 3 tablespoons chopped fresh chives; salt; ground black pepper; 3 egg whites; teaspoon cream of tartar