Pasta Puttanesca

Name: Pasta Puttanesca
Ingredients: 2 tablespoons extra virgin olive oil; 1/2 cup finely chopped onion; 3 cloves garlic, finely chopped; 3 to 4 canned anchovies , chopped; 2 tablespoons tomato paste; 1/2 teaspoon red pepper flakes; 1 ( 28 - ounce ) can crushed tomatoes; 2 teaspoons dried oregano; 2 tablespoons small (non-pariel) capers; 3/4 cup ( 95 g ) pitted olives (black or green), roughly chopped; 1 pound spaghetti , linguine, or fettuccine; Salt; Extra virgin olive oil, for drizzling; 1/4 cup chopped fresh parsley