Purée the soup: Combine the blanched almonds, torn bread, garlic, cold water, sherry vinegar, and salt in a high-powered blender. Blend on high until the mixture becomes exceptionally smooth and pale, about 2 to 3 minutes. While the blender continues running, slowly pour in the olive oil to emulsify the mixture, blending only until the soup turns silky and thick—its texture should resemble a pourable, yogurt-like consistency. If it feels too dense, add a splash of cold water to reach your preferred texture.