Orange-Ginger Sweet Potato Casserole

Preheat oven to 450 degrees F (230 degrees C). Place oven rack in middle position. Lightly grease a 1 1/2 quart baking dish, and set aside.

Line a rimmed baking sheet with foil. Pierce each sweet potato several times with a fork, and place on the prepared baking sheet.

Roast the sweet potatoes in preheated oven until easily pierced with a fork, 1 to 1 1/2 hours.

Remove sweet potatoes from the oven, and cool about 15 minutes. Lower oven temperature to 375 degrees F (190 degrees C).

When sweet potatoes are cool enough to handle, cut in half, and scoop flesh into the bowl of a food processor. Discard potato skins. Add the orange zest, ginger; and egg yolks; process to make a smooth mixture. Season to taste with salt and pepper. Pour in the orange juice and milk; if desired, add more orange juice to taste. Spoon sweet potato mixture into prepared baking dish. Sprinkle top with pecans.

Bake in preheated oven until heated through and pecans are toasted, about 30 minutes.