I prefer grilled over boiled sweet potato.. and if you haven't tried it, you should!
Sweet potato (Peeled)
Chilli flakes as per taste
Oregano as per taste
Salt as per taste (Sea salt preferably)
Oil for coating
Make small cuts on potato using knife.
Mix chilli flakes, oregano, salt in oil. Apply the oil on potato.
Preheat at 180 degrees and set the oven in grill mode. Cook sweet potatoes for 15 minutes, check in between, increase by another 5 minutes if not cooked.
If you have an electric tandoor,
Preheat for 5 minutes, grill the potatoes for 10 minutes.