Step 1Puree the cucumbers in a blender. Push the cucumbers through a sieve into a medium bowl. Blend the grapes and garlic in the blender, then push through a sieve and stir into the cucumbers.
Step 2Whisk in the yogurt, sour cream and lemon juice, and season with the salt, sugar and vinegar. Add the Tabasco to taste. This makes about 1 1/2 quarts of soup. Chill the soup, then divide among chilled bowls and garnish with the almonds, grapes and paprika oil before serving.