Walnut and Sage Potatoes au Gratin


A creamy sauce coats the potatoes in this elegant side-dish casserole. Serve it at dinner alongside ham, beef, or turkey.

Walnut-Sage Potatoes
Photo: Kritsada Panichgul
Prep Time:
30 mins
Bake Time:
1 hr 10 mins
Stand Time:
10 mins
Total Time:
1 hr 50 mins


  • 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.)

  • cup broken walnuts

  • Fresh sage leaves (optional)


  1. 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:

  2. 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.

  3. 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.)

  4. 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.

Nutrition Facts (per serving)

217 Calories
12g Fat
20g Carbs
9g Protein
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.

Related Articles