Place 1/2 cup fresh raspberries and 1 diced mango in a bowl. Sprinkle with 1/2 tablespoon sugar and set aside.
In a blender or food processor, place 1/3 cup balsamic vinegar, 1/2 tablespoon honey, and 1/4 teaspoon salt. Pulse to combine.
Slowly add in 2 tablespoons of olive oil until the mixture is combined.
Add the fruit to the blender or food processor and pulse to combine well. Using a good blender or a food processor will take care of the raspberry seeds, but you can strain it through a fine mesh strainer if needed.