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Ingredients
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2 ½ pounds sweet potatoes, peeled and cut into 1/4-inch slices (about 8 cups)
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3 tablespoons extra-virgin olive oil, divided
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1 small onion, finely chopped (about 1 cup)
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3 tablespoons all-purpose flour
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½ teaspoon salt
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¼ teaspoon white or black pepper
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2 ½ cups low-fat milk
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1 cup shredded Gruyère cheese, divided
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2 teaspoons chopped fresh rosemary
Directions
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Position racks in upper and lower third of oven; preheat to 425 degrees F.
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Toss sweet potatoes with 1 tablespoon oil in a large bowl until well coated. Divide between 2 large baking sheets and spread in an even layer. Roast, rotating the pans from top to bottom about halfway through, until tender and beginning to brown, 20 to 25 minutes.
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Meanwhile, heat the remaining 2 tablespoons oil in a large saucepan over medium heat. Add onion; cook, stirring frequently, until very soft and golden brown, 5 to 8 minutes. Add flour, salt and pepper; cook, stirring, for 1 minute more. Add milk; cook, stirring and scraping up any brown bits at the bottom of the pan. increase heat to medium high; cook, stirring, until the sauce thickens and bubbles, 3 to 5 minutes. Remove from heat.
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When the sweet potatoes are done, remove them from the oven. Preheat the broiler. Transfer half the sweet potatoes to a 2-quart broiler-safe baking dish. Spread half the sauce over the sweet potatoes and top with 1/2 cup cheese. Add the remaining sweet potatoes and top with the remaining sauce and cheese. Broil, watching carefully, until the sauce is bubbling and the cheese is beginning to brown, 1 to 5 minutes, depending on your broiler. Let stand 10 minutes. Serve topped with rosemary.
Tips
To make ahead: Roast potatoes (Step 2) up to 30 minutes ahead. Prepare sauce (Step 3), cover and refrigerate for up to 1 day; gently reheat until steaming before combining with the potatoes and cheese.
Nutrition Facts (per serving)
222 | Calories |
9g | Fat |
29g | Carbs |
8g | Protein |
Nutrition Facts | |
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Servings Per Recipe 10 | |
Serving Size 1/2 cup | |
Calories 222 | |
% Daily Value * | |
Total Carbohydrate 29g | 11% |
Dietary Fiber 4g | 14% |
Total Sugars 11g | |
Protein 8g | 16% |
Total Fat 9g | 11% |
Saturated Fat 3g | 16% |
Cholesterol 15mg | 5% |
Vitamin A 22027IU | 441% |
Vitamin C 23mg | 25% |
Folate 20mcg | 5% |
Sodium 262mg | 11% |
Calcium 232mg | 18% |
Iron 1mg | 6% |
Magnesium 43mg | 10% |
Potassium 655mg | 14% |
Nutrition information is calculated by a registered dietitian using an ingredient database but should be considered an estimate.
* Daily Values (DVs) are the recommended amounts of nutrients to consume each day. Percent Daily Value (%DV) found on nutrition labels tells you how much a serving of a particular food or recipe contributes to each of those total recommended amounts. Per the Food and Drug Administration (FDA), the daily value is based on a standard 2,000 calorie diet. Depending on your calorie needs or if you have a health condition, you may need more or less of particular nutrients. (For example, it’s recommended that people following a heart-healthy diet eat less sodium on a daily basis compared to those following a standard diet.)
(-) Information is not currently available for this nutrient. If you are following a special diet for medical reasons, be sure to consult with your primary care provider or a registered dietitian to better understand your personal nutrition needs.