In Step 1, the potatoes can also be cooked in the microwave, but we prefer the crisp texture of the skins after baking in the oven.
Preheat oven to 400°. Pierce potatoes with a fork; bake directly on oven rack 1 hour or until tender. Cool 10 minutes. Sauté shallot and garlic in hot oil in a Dutch oven over medium high heat 1 minute. Stir in greens and next 2 ingredients. Add salt and black pepper to taste. Cook 10 minutes or until tender. Cut potatoes in half lengthwise; carefully scoop pulp into a large bowl, leaving shells intact. Mash together potato pulp, sour cream, next 4 ingredients, and 1/2 cup cheese. Add greens mixture. Spoon into potato shells, and place on a lightly greased (with cooking spray) baking sheet. Bake at 400° for 15 minutes. Top with remaining cheese, and bake 3 to 5 minutes or until cheese melts and potatoes are thoroughly heated.