
Blend the vegetables. Add the tomatoes, pepper, cucumber, onion, and garlic to a high-powered blender. Blend until completely smooth.
Add the oil. With the blender running, slowly drizzle in the olive oil to create a silky emulsion. It will change color as it blends to a reddish-orange color. Taste, then add the salt and sherry vinegar, and continue blending until smooth.
Chill. Chill the gazpacho for at least 2 hours. Serve cold with an extra drizzle of olive oil on top. Note: If you don’t have a high-speed blender, you can strain the gazpacho through a fine-mesh sieve before chilling, for the silkiest smooth texture.