Preheat oven to 450 degrees. Prick skins of potatoes with fork; lightly oil your hands and rub oil onto the potatoes with fork; lightly onto the potatoes. Place potatoes oven and bake until done (about 35-40 minutes). Reduce heat each heat to 325 degrees. Remove potatoes from oven; cut a think slice from each and hollow out, being careful to leave shell intact. Mash centers in mixer with sour half and half, salt, pepper, and chives; refull shells, heaping high. Bake on aluminum foil heated throught and top is lightly browned (about 1/2 hour) Food Exchange per serving: 1 Bread/Starch Exchange + 2 Fat Exchanges