Recipe: <!-- -->Sweet and Spicy Tuna Rigatoni<!-- -->

Ingredients

• 1 pound dried rigatoni pasta
• 1/4 teaspoon fine sea salt
• 3 tablespoons extra-virgin olive oil
• 1 large yellow onion, thinly sliced
• 3 cloves garlic, finely chopped
• 1/4 teaspoon ground black pepper
• 1/4 teaspoon crushed red chile flakes
• 1/2 cup raw walnut halves and pieces
• 1 can (28-ounce) whole tomatoes, drained
• 2 cans (6-ounce) tuna packed in water, drained
• 3/4 cup seedless raisins
• 1/2 cup fresh flat-leaf parsley, chopped