Make-Ahead: This gazpacho is best made at least 30 minutes ahead and will keep well in the refrigerator for up to 48 hours. Press plastic wrap directly against the surface to prevent browning from the avocado. Stir or briefly re-blend before serving. Consistency: For a thicker soup, reduce the water to 1/4 cup. For a thinner, more drinkable consistency, add up to an additional 1/2 cup cold water and adjust seasoning accordingly. Freezing: Not recommended — the avocado and cucumber have high water content and the texture will become watery and grainy upon thawing. Vinegar Substitute: White wine vinegar, apple cider vinegar, or fresh lemon juice can all substitute for sherry vinegar. Start with a smaller amount and adjust to taste. Servings: This recipe makes approximately 5 to 6 cups of soup, serving 4 as a starter or 2 to 3 as a main course lunch.