If I think Italian and If I think appetizer... I have to be thinking of Bruschetta. Introduced to it at La Belle Vie, though I have never been able to replicate it completely, this came close.
Heirloom tomatoes seeded and diced. A good measure of olive oil, salt and freshly cracked pepper. Basil and chopped capers. All let to marinade for an hour in the fridge and topped on crusty bread. Can never go wrong with this.