Sweet Potato and Ginger Slaw

Ingredients

• 1/4 cup vegetable oil
• 1/4 cup lime juice
• 1-1/2 tablespoons sugar
• 1-1/2 teaspoons grated fresh ginger
• 1/2 teaspoon salt
• 1-1/2 pounds sweet potatoes, julienned or coarsely grated (about 5-½ cups)
• 1/2 cup toasted walnuts pieces
• 1/4 cup sliced scallions