MyFridgeFood - Cheesy Chicken Pasta

Ingredients

• 8 ounces whole-wheat penne
• 2 cups 1/2-inch cauliflower florets
• 1 tablespoon extra-virgin olive oil
• 1/2 cup finely chopped onion
• 1/2 cup dry white wine
• 3 cups low-fat milk
• 3 tablespoons all-purpose flour
• 3/4 teaspoon salt
• 1/2 teaspoon freshly ground pepper
• 1 cup shredded Gruyère, or Swiss cheese
• 3 cups shredded cooked chicken, or turkey (12 ounces; see Tip)
• 1 teaspoon Dijon mustard
• 2 tablespoons chopped fresh chives, or scallion greens