Place the chopped tomatoes, cucumber, bell pepper, and onion into the blender.
4 cups ripe tomatoes, 1 medium cucumber, 1 bell pepper red bell pepper, 1/2 cup red onion
Add red wine vinegar, olive oil, a pinch of salt, and black pepper to the blender.
2 tablespoons red wine vinegar, 3 tablespoons olive oil, to taste salt, to taste black pepper
Secure the lid on the blender, then blend on high speed until the mixture is completely smooth and velvety, about 30 seconds. You should see a uniform liquid with no large vegetable pieces.
Taste the soup and adjust seasoning with additional salt or vinegar as desired. Optionally, chill in the refrigerator for at least 1 hour to let flavors meld.
Pour the chilled gazpacho into bowls, garnish with fresh herbs or a drizzle of olive oil if desired, and serve cold with optional accompaniments.