Preparation Whisk first 8 ingredients in large bowl. Gradually whisk in both oils. Chill at least 2 hours or up to 2 weeks. Rewhisk before serving. Buying guide: Harissa paste, a spicy North African red chili paste, is sold at some supermarkets and Middle Eastern markets. If unavailable, substitute hot Thai-style chili sauce, such as Sriracha. Jars of preserves (brine-cured) lemons can be found at many specialty foods stores. If unavailable, substitute a mixture of 1/4 cup grated lemon peel, 1 1/2 teaspoons sugar, and 3/4 teaspoon salt (let stand at room temperature for an hour before using).
Preparation Whisk first 8 ingredients in large bowl. Gradually whisk in both oils. Chill at least 2 hours or up to 2 weeks. Rewhisk before serving. Buying guide: Harissa paste, a spicy North African red chili paste, is sold at some supermarkets and Middle Eastern markets. If unavailable, substitute hot Thai-style chili sauce, such as Sriracha. Jars of preserves (brine-cured) lemons can be found at many specialty foods stores. If unavailable, substitute a mixture of 1/4 cup grated lemon peel, 1 1/2 teaspoons sugar, and 3/4 teaspoon salt (let stand at room temperature for an hour before using).