Prick the sweet potatoes in a few places with a fork. Rub all over with the oil; sprinkle with pepper and 2 teaspoons of the salt. Place potatoes on a baking sheet lined with parchment paper or aluminum foil in a cold oven. Set oven temperature to 350°F, and bake sweet potatoes until the potato flesh has pulled away from the skins and potatoes are completely soft, 1 to 1 1/2 hours. Remove potatoes from the oven, and cool 15 minutes. Increase oven temperature to 400°F.
Cut sweet potatoes in half lengthwise. Carefully scoop pulp into a bowl, leaving shells with 1/4 inch of flesh intact. Place 6 shells in a single layer in a 13- x 9-inch baking dish; discard remaining 2 shells.
Process sweet potato pulp, butter, cream, orange zest, vanilla bean seeds, 1 tablespoon of the honey, remaining 1/2 teaspoon salt, and, if desired, tamari until smooth, about 1 minute. Add eggs, and process until blended, about 1 minute. Spoon filling into reserved skins.
Bake sweet potatoes at 400°F until filling is puffed and golden brown, 30 to 35 minutes. Drizzle sweet potatoes with remaining 1 tablespoon honey and a very light dusting of freshly grated nutmeg, and serve.