There are several ways to make harissa. It's not hard, this version with dried chilli peppers is the most popular in Tunisia.
View the original recipe via:
https://ohmydish.com/recipe/homemade-harissa
Soak the dried chilli peppers in hot water, cover the bowl using cling film and let the peppers soften in about half an hour.
Meanwhile, peel the cloves of garlic. Remove the stems and seeds from the chilli peppers.
Create a paste using a mortar and pestle or by using a small blender. Puree the peppers and garlic cloves into a smooth paste. Add a little bit of water (from the bowl where you've soaked the chilli peppers in) to make it a bit smoother. You can also use a splash of good quality olive oil.
Add in cumin seed, caraway seed and salt and puree into a fine paste. You can now use the homemade harissa for all kinds of different types of dishes, such as chicken or as a condiment by mixing it in with some mayonnaise. Enjoy!
