Cover the bottom of a large frying pan with 1 tbsp. oil and heat to medium. Add the sausage and brown for 3 minutes on each side. Remove the sausage from the panand set aside.
Add 1 tbsp. oil to the pan along with the red and yellow bell peppers and onions. Season to taste with salt and pepper and cook until light brown, about 5 minutes. Remove from the heat and arrange the sausage and vegetables on a serving platter.
In a small sauce pan, add the balsamic vinegar. Cook over medium low heat for 15 to 20 minutes until the vinegar has reduced by half, making about ½ cup of a dark, syrupy balsamic glaze.
Drizzle the balsamic glaze over the sausage and peppers and top with a sprinkle of chopped oregano and feta cheese. Serve with an ice cold beer and enjoy with family and friends.