Heat oven to 425°F.
Place the potatoes on the middle rack, and cook for 60-70 minutes, until the skins are crisp and a knife easily pierces them.
Remove from oven and let cool.
When cool enough to handle, slice potato in half lengthwise.
Using a spoon, scoop out the flesh, leaving about 1/4 inch intact.
Reserve the flesh for Potato Tot Recipe.
Slice potato in half length wise, again.
(Note: These can be made weeks in advance and frozen.)
Fill a large pot halfway with oil.
Heat oil to 360°F.
Add skins and fry until golden deep brown, about 2-3 minutes.
Remove to paper-towel-lined plate.
Sprinkle with salt.
Place all skins on a sheet tray lined with parchment paper.
Sprinkle with cheese.
Place under broiler on high, until cheese melts.
Remove from oven, top with bacon, sour cream, chives, serranos and avocado.