Step 1

Heat oven to 200 degrees. Using a vegetable peeler, peel citrus to make strips of zest, being careful not to remove pith. Arrange in a single layer on a parchment-lined baking sheet and bake until dry, about 1 hour. Let cool.

Step 2

Transfer zest to a 1-quart glass jar and top with remaining ingredients. Cover tightly and store in a cool, dark place for three weeks, shaking jar once a day.

Step 3

Pour liquid through a fine mesh strainer or paper coffee filter and into a clean jar. Add citrus zest and discard aromatics.