1. Broil the red pepper on high for about 25 minutes, turning occasionally, until blackened on the outside. Transfer to a bowl, cover with plastic wrap and let cool. This is called sweating, and it allows you to easily peel the skin off the pepper. Peel the pepper and discard its skin and seeds.
2. Rehydrate the chiles by placing them in a bowl of hot water for 10 minutes.
3. Heat the olive oil in a frying pan over medium heat, and fry the onion, garlic and rehydrated chiles for 10 to 12 minutes, until dark and smoky. Now use a blender or a food processor to combine all the harissa ingredients until smooth, adding a little more oil if needed.
(Chaya Rappoport is the blogger, baker and picture taker behind retrolillies.wordpress.com. Currently a pastry sous chef at a Brooklyn bakery, she's been blogging since 2012 and her work has been featured on The Feed Feed, Delish.com, Food and Wine, and Conde Nast Traveler.)
The Nosher food blog offers a dazzling array of new and classic Jewish recipes and food news, from Europe to Yemen, from challah to shakshuka and beyond. Check it out at www.TheNosher.com.