Ají (Colombian-Style Tomato and Onion Salsa) Recipe

Ingredients (6)

• 4 medium roma tomatoes, cut into 1/2- to 1/4-inch dice (about 2 cups)
• 4 scallions, white parts only, split into quarters lengthwise, finely sliced (about 1/4 cup)
• 1/2 cup loosely packed fresh cilantro leaves, finely chopped
• 1 serrano or jalapeño chili, seeds and stems removed, finely chopped (optional)
• Kosher salt
• 1/2 cup cold water