The juice of a lemon.
Season: available year-round
How to prepare: Juice lemons at room temperature to yield more juice. If your lemons have been refrigerated, heat them individually on high in the microwave for 20-40 seconds. Then roll the lemon firmly on the countertop soften it.
Substitutions: 1 medium lemon yields 2-3 tablespoons of juice 5-6 lemons will yield 1 cup of juice.