Harissa is a North African chili paste that’s wonderful when stirred into soups and stews or spooned over roasted vegetables and meats. Store-bought harissas are available by the jar or tube at many Mediterranean markets or online, but making your own is a fun and easy way to customize the flavor, as Yotam does here with the addition of rosewater and dried rose petals. A word to the wise: Harissa has a serious kick, but you can remove the stems and seeds from the chilies after they rehydrate…