Lycopene, found in tomatoes, is an antioxidant thought to help fight disease. Tomatoes also provide vitamin C, folate and potassium.
Place garlic, scallion, tomatoes, and bell peppers in a food processor; pulse until the vegetables are small chopped pieces. Add rice vinegar, kosher salt, and black pepper; chill. Cut cucumbers crosswise into 1-inch pieces; use a melon-baller to make small cups (be careful not to break through bottoms of cucumbers). Spoon gazpacho into cucumber cups; serve.