Put oven rack in upper third of oven and preheat oven to 450°F.
Peel sweet potatoes, then cut each lengthwise into 6 spears. Cut spears in half crosswise if desired, then arrange in 1 layer in a large (17- by 12-inch) shallow baking pan.
Cook bacon in a 10-inch heavy skillet over moderate heat, stirring, until browned and crisp, 10 to 15 minutes. Transfer with a slotted spoon to paper towels to drain, then pour bacon fat through a fine-mesh sieve onto potato spears and toss with 2 spatulas to coat. Sprinkle spears with 1/2 teaspoon salt and 1/4 teaspoon pepper and roast (uncovered), turning every 15 to 20 minutes, until potatoes are tender and edges are browned, 45 minutes to 1 hour. Transfer to a serving dish.
Return bacon to cleaned skillet, then add oil and heat over moderate heat until hot but not smoking. Stir in white part of scallions and remove from heat. Stir in vinegar, water, remaining 1/2 teaspoon salt, and remaining 1/4 teaspoon pepper and pour over potato spears. Sprinkle potatoes with scallion greens and serve warm.

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Nutrition Facts

Per Serving Per 100 g

Amount Per 1 Serving
Calories	377.92 Kcal (1582 kJ)
Calories from fat	166.07 Kcal
		% Daily Value*
Total Fat	18.45g	28%
Sodium	549.73mg	23%
Potassium	925.14mg	20%
Total Carbs	46.12g	15%
Sugars	9.47g	38%
Dietary Fiber	7.01g	28%
Protein	8.35g	17%
Vitamin C	5.6mg	9%
Vitamin A	2.3mg	76%
Iron	2.3mg	13%
Calcium	74.2mg	7%

Amount Per 100 g
Calories	137.65 Kcal (576 kJ)
Calories from fat	60.49 Kcal
		% Daily Value*
Total Fat	6.72g	28%
Sodium	200.22mg	23%
Potassium	336.96mg	20%
Total Carbs	16.8g	15%
Sugars	3.45g	38%
Dietary Fiber	2.55g	28%
Protein	3.04g	17%
Vitamin C	2mg	9%
Vitamin A	0.8mg	76%
Iron	0.9mg	13%
Calcium	27mg	7%

* Percent Daily Values are based on a 2000 calorie diet. Your daily values may be higher or lower depending on your calorie needs.
Find out how many calories should you eat.

Tastes

salty
savory
bitter
sweet

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