Preheat the oven to 300 degrees Fahrenheit.
Mix the boiling water with the oil, salt and Harissa.
Inside an oven bag, place the wheatberry and pour the water inside the bag. Tie the bag.
Fill an ovenproof pot with boiling water (1/3 of a pot)
Place the bag inside the pot, cover with a lid and bring to a boil on a stovetop. Once the water has boiled place the pot in the oven for 4 hours.
Remove the wheatberry from the bag and serve as a side dish.