Creamy Casserole Sauce: In a saucepan over medium heat, melt 2 tablespoons butter. Whisk in 2 tablespoons flour and cook 2 minutes. Slowly whisk in 2 cups chicken or vegetable broth. Remove from heat and let cool slightly. Whisk ⅓ cup Greek yogurt or sour cream and slowly stir into broth mixture. Stir in ½ cup Parmesan cheese.
PER SERVING (1½ cups): 381 cal, 20g fat (9g mono, 3g poly, 8g sat), 65mg chol, 485mg sodium, 23g carb, (4g fiber, 4g sugars), 24g protein