Nectarine Meringue Tart with Rhubarb

Here the word tart, which has two meanings—a type of pie and a sour flavor—applies both ways. The slightly acidic, sour taste of rhubarb combines beautifully with sweet Italian meringue, providing the base for this refreshing dessert. Nectarines have a fairly short season; try replacing them with either plums or peaches when they are not available. My preference is to leave the skin on fruit whenever possible to provide color. Because most commercial peaches are gently scrubbed to re