Remove the zest from 1 orange and 1 lemon in strips using a vegetable peeler; thinly slice the strips. Bring the zest, the juice from the orange and lemon, 5 cups grated carrots, 3/4 cup sugar, 3/4 cup cider vinegar, 1 1/2 cups water and 1 1/2 teaspoons each crushed coriander seeds, mustard seeds and salt to a simmer in a saucepan over medium heat. Cook until the liquid is syrupy, about 45 minutes.

Photograph by Anna Williams