Mint Sprigs (Optional) Stem and wash the grapes, then chill thoroughly. One-half hour before serving, arrange 1/3 cup of grapes in each of 6 sherbet glasses. Combine the orange and lime juice, sweetening if necessary, Blend well and pour over the grapes, allowing about 1/3 cup for each glass. Chill until served, then garnish with mint sprigs, if desired.