Heat the 1/3 cup of olive oil in a wide, shallow pot and sauté the onions over medium heat until soft. Add the garlic and sauté for a minute to soften. Pour in the tomatoes with all their juices. Bring to a simmer and pour in the wine. Bring back to a simmer, lower heat, and add the Mastiha and salt and pepper to taste. Simmer the sauce for about 20-25 minutes, or until thick. Add the oregano just before removing from heat.

While the sauce is simmering, boil the pasta. Drain and toss with a little olive oil. Toss the hot sauce and bocconcini into the pasta and serve immediately with a little fresh pepper and garnished with fresh oregano.