This is a lovely, spicy, warm flavored sauce that can be adapted by adding other ingredients. I often stir in hard-boiled eggs or bread crumbs soaked in vinegar, which adds different textures.
Serve with fish, cooked meats, cheese and salads.
Put the mustard leaves and garlic into a food processor and blend with 2 tsp vinegar. With the processor still running, add the olive oil in a slow stream, season to taste, then add the remaining vinegar if required.
Reprinted with permission from Jekka's Herb Cookbook by Jekka McVicar, Firefly Books 2012.
The city of Samarkand is on the storied Silk Road, but off the beaten path for many tourists. Caroline Eden and Eleanor Ford make the case for the ancient Uzbek city's food and culture in their new book, Samarkand: Recipes & Stories from Central Asia & The Caucasus. They spoke with Lynne Rossetto Kasper about it.