Prepare infused vinegar*
In a small saucepan, warm vinegar and sugar, stirring to dissolve sugar. Remove from heat and cool to room temperature. Add 2 tablespoons of syrup to a tall glass filled with ice and top with seltzer.
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Infusions are a quick, easy and delicious way to capture seasonal flavors. I find them particularly helpful for using up the late-season bits and bobs from the market–a few of the last stone fruits...