Mini Twice Baked Potatoes with Cheddar and Scallions

baby potatoes (scrubbed (about 1 1/2 pounds))

olive oil

Salt and freshly ground black pepper

shredded cheddar cheese

sour cream

scallions or chives (sliced)

butter (melted)

strips bacon (fried and crumbled)

Fresh parsley for garnish (optional)