Gazpacho

Name: Gazpacho
Ingredients: 3 cups finely diced plum tomatoes, juices reserved; 2 cups finely diced cucumbers, peeled and seeded; 1 1/4 cups finely diced onion; 1 cup finely diced red bell pepper; 1 tsp minced garlic; 2 tbsp tomato paste; 2 tbsp extra-virgin olive oil; 2 tbsp minced fresh herbs (tarragon, thyme, or parsley); 3 cups canned tomato juice; 1/4 cup red wine vinegar, or as needed; Juice of 1/2 lemon, or as needed; 1/4 tsp salt, or as needed; 1/4 tsp cayenne pepper, or as needed; 1 cup tiny croutons; 1/2 cup thinly sliced chives or scallion greens