4.7 from 27 votes
Easy Potatoes Au Gratin
Tender sliced potatoes baked to perfect with a creamy sauce made with milk, cheese, garlic, mustard, and onions.
Prep Time
15 mins
Cook Time
1 hr 15 mins
Total Time
1 hr 35 mins
Servings: 8
Calories: 127 kcal
Course:
Side Dish
Cuisine:
French , American
Ingredients
- 2 pounds potatoes peeled and thinly sliced
- Kosher salt and freshly ground black pepper to taste
- 3 tablespoons olive oil divided
- 1 medium yellow onion thinly sliced
- 3 garlic cloves minced
- 1 tablespoon wholegrain mustard
- 3 tablespoons gluten-free flour or cornstarch
- 2 1/2 cups almond milk
- 1 teaspoon freshly grated nutmeg or to your taste
- ¾ cup grated gruyere cheese
- fresh thyme to garnish
Instructions
- Preheat the oven to 350F and spray a baking dish with cooking oil spray or olive oil.
- Add sliced potatoes and season with salt and pepper. Drizzle 2 tbsp oil and toss well to coat. Place in the preheated oven and bake for 15 minutes, or until potatoes begin to soften and the sauce is ready.
- Meanwhile, heat a rimmed pan over medium heat and drizzle with 1 tbsp oil. Sauté the onion and garlic for 2-3 minutes, or until it softens.
- Stir in the mustard and flour. Slowly pour the milk and whisk until sauce is thickened and smooth, 2-3 minutes.
- Season with salt, pepper, and nutmeg.
- Remove the potatoes from the oven and pour over the sauce, stirring gently to mostly cover and coat.
- Top with shredded cheese. (You can now cool and refrigerate the dish for make-ahead.)
- Return to the oven and bake for 60 minutes, or until potatoes are super tender, bubbly, and golden-brown on top. (Cooking time may vary depending on the size of the thickness of your potato slices.)
- Garnish with fresh thyme before serving.
Cup of Yum
Notes
- Oven temperature: Please note that everyone's will be different and cooking time will vary. If you try a higher temperature of 400F it will take 35-40 minutes. At 350F it will need 50-60 minutes depending.
- Milk: we used almond milk, but you may use any other milk of choice.
- we used almond milk, but you may use any other milk of choice.
- Mustard: whole grain mustard was used but you may use Dijon mustard
- Cheese: If you don't like gruyere or want to use another cheese, consider using a mix of sharp cheddar and parmesan, or gouda.
- Potatoes: consider using Yukon gold potatoes
- Flour: Any flour would work for this recipe. Feel free to use cornstarch too. We love to use Whole wheat as well.
- Bake time: Don't rush them, they need a good one hour in the oven depending on your oven
Nutrition Information
Calories
127kcal
(6%)
Carbohydrates
4g
(1%)
Protein
5g
(10%)
Fat
10g
(15%)
Saturated Fat
3g
(15%)
Cholesterol
14mg
(5%)
Sodium
165mg
(7%)
Potassium
35mg
(1%)
Fiber
1g
(4%)
Sugar
1g
(2%)
Vitamin A
117IU
(2%)
Vitamin C
1mg
(1%)
Calcium
226mg
(23%)
Iron
1mg
(6%)
Nutrition Facts
Serving: 8Serving
Amount Per Serving
Calories 127
% Daily Value*
| Calories | 127kcal | 6% |
| Carbohydrates | 4g | 1% |
| Protein | 5g | 10% |
| Fat | 10g | 15% |
| Saturated Fat | 3g | 15% |
| Cholesterol | 14mg | 5% |
| Sodium | 165mg | 7% |
| Potassium | 35mg | 1% |
| Fiber | 1g | 4% |
| Sugar | 1g | 2% |
| Vitamin A | 117IU | 2% |
| Vitamin C | 1mg | 1% |
| Calcium | 226mg | 23% |
| Iron | 1mg | 6% |
* Percent Daily Values are based on a 2,000 calorie diet.