Separate the sausages, link by link. Cut into ½-inch round or oval slices. Heat 1 tablespoon olive oil in a nonstick skillet and saute the sausages over medium heat until browned and cooked through. Remove sausage from pan. Add onions and garlic and cook over low heat until soft, about 12 minutes.

In the meantime, cut the green peppers into 2.5 cm/one-inch wide strips. Cut the flame-roasted Florina peppers into 2.5 cm/one-inch wide strips and cut in half lengthwise to be about the same size as the green bell pepper strips. Heat the remaining olive oil in the skillet and saute the green peppers until soft but firm. Add the red peppers, toss to combine.

Add the sausage back to the skillet. Toss all together. Pour in vinegar, oregano and Santorini tomatoes. Cook all together for 12-15 minutes, for the flavors to meld. Remove and portion out onto individual plates. Serve, with a little feta on the side, if desired.