Add the sweet potato strips to a big pot of room temperature water, add 1 tbsp salt, mix well and let it sit for 30 minutes.
Pre-heat the oven to 180° C for 10 minutes, if using air-fryer pre-heat at 160° C for 5 minutes.
Drain out the water, dry the strips with a kitchen towel. Transfer them to a bowl and add the oil or melted butter, mix well. Add in all the ingredients except water and mix well, add water in the end to allow the coating to stick to the fries. Check the salt and adjust accordingly.
Transfer the mixed fries to a baking tray lined with parchment paper and bake for 20 -25 minutes or until done, turning them in between for even frying. If using the air-fryer, fry them in batches(do not crowd the air-fryer basket) for 12-15 minutes turning in between.