Being a committed carnivore, I rarely concern myself with calories, but according to Google, it actually has lower trans fat than butter, definitely a plus.
After going through several recipes online, I arrived at this one from BBC, which seems simple enough and does not require any special ingredients/utensils.
Incorporating the tips from the comments section (eg boiling the potatoes for longer) and sprinkling it with more garlic and parsley, I ended up with the best tasting roasted potatoes I've ever made or tasted!
Crispy on the outside and thoroughly fluffy on the inside! The added garlic and parsley complements the flavour of the goose fat... this is definitely a keeper.