There are two ways to prepare harissa - machine and manual. If you intend to grind peppers in a blender, then in addition to seeds and stalks, they must also be removed from the skin. If you cut the fruit with a knife, you can not remove the skin. Cooking harissa by hand is a laborious process. If you decide to do this, do not forget to wear culinary gloves when working with pepper.
Preheat oven to 180°C.
Grease a baking sheet with vegetable oil. Sort the peppers, removing all low-quality fruits. Wash thoroughly, dry. Place on a baking sheet, sprinkle with 2 tbsp. l. vegetable oil, cover with foil and put in the oven for 40 minutes.
Remove peppers from oven, let cool to room temperature. Cut each fruit in half lengthwise, remove seeds and stalks.
Grind the peppers to a smooth puree consistency.
Peel the garlic and chop very finely. Place chopped peppers and garlic in a bowl. Add cumin and salt, mix thoroughly.
Transfer the harissa to a clean jar. Pour in olive oil.