• 2 teaspoons balsamic vinegar
• 2 teaspoons fresh lemon juice
• 1 teaspoon sugar
• 1/2 teaspoon salt
• 1/4 teaspoon black pepper
• 3 tablespoons extra-virgin olive oil
• 1 (1-lb) firm-ripe mango, peeled and cut into 1/2-inch cubes
• 1 large tomato, cut into 1/2-inch cubes
• 1 small red onion, halved lengthwise and thinly sliced crosswise
• 1/3 cup fresh cilantro leaves

Whisk together vinegar, lemon juice, sugar, salt, and pepper until sugar is dissolved, then add oil, whisking until emulsified. Add remaining ingredients and toss until coated.