1. Place the grape tomatoes, bocconcini, proscuitto, olives and capers in a large bowl and set aside.
2. In a small bowl, whisk together white wine vinegar, mustard, black pepper, and sugar.
3. Slowly add in the extra virgin olive oil in a slow but steady stream whisking while pouring until all the oil is added and the dressing is well blended.
4. Whisk in the chives and oregano.
5. Pour dressing over salad and gently toss to combine.
6. Cover and chill 2-4 hours or overnight to allow the flavors to devolp, stirring occasionaly.
7. Season with more black pepper if desired.
8. When ready to serve use a slotted spon to transfer into a serving bowl.