Recipes and Cooking Walnut and Sage Potatoes au Gratin 4.3 (4) A creamy sauce coats the potatoes in this elegant side-dish casserole. Serve it at dinner alongside ham, beef, or turkey. By BHG Test Kitchen BHG Test Kitchen The Better Homes & Gardens Test Kitchen has been in continuous operation for nearly 100 years, developing and testing practical, reliable recipes that readers can enjoy at home. The Test Kitchen team includes culinary specialists, food stylists, registered and licensed nutritionists, and other experts with Bachelor of Science degrees in food science, food and nutrition, or culinary arts. Together, the team tests more than 2,500 recipes, produces more than 2,500 food images, and creates more than 1,000 food videos each year in the state-of-the-art test kitchen. Learn about BHG's Editorial Process Published on June 14, 2011 Print Share Share Tweet Pin Email Photo: Kritsada Panichgul Prep Time: 30 mins Bake Time: 70 mins Stand Time: 10 mins Total Time: 110 mins Servings: 10 Jump to Nutrition Facts Ingredients 2 pound fingerling potatoes 1 medium onion, chopped 1 teaspoon bottled minced garlic (2 cloves) 3 tablespoon walnut oil or olive oil 3 tablespoon all-purpose flour ½ teaspoon salt ¼ teaspoon ground black pepper 2 ½ cup milk 3 tablespoon snipped fresh sage 1 cup shredded Gruyere cheese (4 oz.) ⅓ cup broken walnuts Fresh sage leaves (optional) Directions Preheat oven to 350 degrees F. Grease a 2-quart casserole; set aside. Halve potatoes lengthwise. Place potato halves in colander. Rinse with cold water; drain. For sauce: In a medium saucepan, cook onion and garlic in hot oil over medium heat until tender. Stir in flour, salt, and pepper. Add milk all at once. Cook and stir until thickened and bubbly. Remove from heat; stir in snipped sage. Layer half of the potatoes in a greased 2-quart casserole. Top with half the sauce. Sprinkle with half of the cheese. Repeat layering with potatoes and sauce. (Cover and chill remaining cheese until needed.) Cover and bake for 40 minutes. Uncover and bake about 25 minutes more or just until potatoes are tender. Sprinkle with remaining cheese; top with walnuts. Bake, uncovered, for 5 minutes more. Let stand for 10 minutes before serving. If desired, garnish with sage leaves. Makes 10 to 12 servings. Microwave Directions: Using microwave-safe casserole, prepare as directed through Step 3. Cover with plastic wrap, turning back edge of wrap to allow steam to escape. Microwave on 70 percent power (medium-high) for 25 to 30 minutes or until potatoes are tender. Sprinkle with remaining cheese; top with walnuts. Cover and let stand for 5 minutes. Print Nutrition Facts (per serving) 217 Calories 12g Fat 20g Carbs 9g Protein Show Full Nutrition Label Hide Full Nutrition Label Nutrition Facts Servings Per Recipe 10 Calories 217 % Daily Value * Total Fat 12g 15% Saturated Fat 3g 15% Cholesterol 17mg 6% Sodium 187mg 8% Total Carbohydrate 20g 7% Protein 9g Vitamin C 13.6mg 68% Calcium 201.9mg 16% Iron 1.1mg 6% *The % Daily Value (DV) tells you how much a nutrient in a food serving contributes to a daily diet. 2,000 calories a day is used for general nutrition advice.