Boil the pasta according to the package instructions.
1 pound dried pasta
In a skillet, heat up olive oil over medium heat until it's warm.
1 teaspoon olive oil
Add peel and sliced onions, washed cherry tomatoes, and finely chopped garlic. Sautee for a few minutes, until the onion is soft and translucent.
3 cloves garlic, 1 onion, 1 pound cherry tomatoes
Add harissa paste, lemon juice, and seasoning to the skillet with the onions and tomatoes, and stir to combine. Sautee for about a minute or two, or until the sauce becomes fragrant.
⅓ cup harissa paste, ½ lemon, ¼ teaspoon black pepper, ¼ teaspoon salt, 1 teaspoon dried parsley
Turn the temperature down to low, and allow the sauce to rest while you stir occasionally until the pasta is boiled. If the sauce becomes dry, you can add a spoonful of pasta water to make it more creamy.
When the pasta is cooked, drain off most of the excess water. Transfer the drained pasta to the skillet with the sauce, along with a spoonful of leftover pasta water. Use tongs to coat the pasta evenly in the sauce.