Heat a large nonstick skillet over medium-high heat. Add sausage to skillet and cook, stirring occasionally, for 5 minutes. Add tomatoes, 1 tablespoon of the vinegar, canola oil and 1/2 teaspoon of the oregano to pan; cook 2 minutes. Place sausage mixture in a large serving bowl.Advertisement
Meanwhile, bring large pot of salted water to a boil. Cook orzo according to package directions. Add green beans to pasta pot for final 5 minutes of cooking time. Drain and rinse under cold water.
Place pasta mixture in serving bowl with sausage mixture and add remaining 2 tablespoons vinegar, 1/4 teaspoon oregano, the feta, parsley and olive oil. Stir to combine; serve.