Step 1: Prep and Cook Broccoli and Spaghetti
Start by bringing a pot of slightly salted water to a boil. Plunge the broccoli into the boiling water for 1 minute and 30 seconds until it’s perfectly tender. Drain and keep aside. Meanwhile, cook the spaghetti as per the instructions on the package, making sure to save a bit of the pasta water for later. Then, drain the spaghetti and set it aside.

Step 2: Flavor the Oil
In a large frying pan, warm the oil on a low flame. Add the garlic and sauté for 2 minutes to infuse the oil with garlic flavor. Then, remove the garlic with a slotted spoon and discard it, leaving the flavored oil in the pan.

Step 3: Cook Tomatoes and Prawns
Turn the heat up to medium and add the tomatoes to the pan. Let them cook for 5 minutes until they start to soften and release their juices. Stir in the prawns and let them cook until they turn pink, which should take about 2 minutes. Next, add the harissa and lemon zest, mixing well to ensure everything is coated nicely.

Step 4: Combine and Serve
Finally, mix the cooked spaghetti into the pan along with a ladleful of the pasta cooking water. Toss everything well to combine. Add the cooked broccoli into the mix, season according to taste, and serve immediately.