Preheat oven to 400F. Boil or steam potatoes for 10 minutes, to just tender. Drain. Cool.
Combine cheeses and bacon. Season to taste.
Cut cooked potatoes in half and scoop out flesh. Lightly sprinkle the potato halves with oil and bake for 30-45 minutes until crisp and golden.
Fill each potato shell with a teaspoon of mixture and grill for 5-8 minutes, until golden and melts. Garnish with chives.