n a small bowl, whisk together the egg and water for egg wash and set aside.

Food processor dough method: Process the oil, vinegar, flour and salt a few seconds until mixture resembles coarse meal. Add in the egg and pulse a few times. Drop by drop add the water, processing very briefly. The whole process would take 20 to 30 seconds. Wrap and chill the pastry for at least 1 hour.

By hand dough method: Weigh or lightly spoon flour into dry measuring cups, and level with a knife. Combine flour and 3/4 teaspoon salt in a large bowl, stirring with a whisk. Combine canola oil, 1/4 cup water, 1 tablespoon vinegar, and egg in a medium bowl. Gradually add oil mixture to flour mixture, stirring just until moist. Knead lightly until smooth. Shape dough into a ball, and wrap in plastic wrap. Chill for 1 hour.

*If you are adding chile: Preheat broiler. Place poblano on a foil-lined baking sheet; broil 8 minutes or until blackened, turning after 6 minutes. Place in a paper bag; close tightly. Let stand 15 minutes. Peel chile; cut in half lengthwise. Discard seeds and membranes. Finely chop.

Preheat oven to 400°.

In a large bowl, combine cumin, poblano (I omitted the pepper), sweet potatoes, and next 6 ingredients (through 1/2 teaspoon salt) in a large bowl; mash with a fork until almost smooth.

Divide dough into 10 equal portions, shaping each into a ball. Roll each dough portion into a (5-inch) circle on a lightly floured surface.

Working with 1 portion at a time (cover remaining dough to keep from drying), spoon about 2 level tablespoons sweet potato mixture into center of each circle (make it where you can close the empanada and not have it squish out).