Ingredients

2 tablespoons olive oil 

1 large onion, finely chopped (about 2 cups) 

1 pound ground pork shoulder 

2 teaspoons crushed red pepper flakes 

2 teaspoons coarse salt 

2 tablespoons tomato paste 

2 (28-ounce) cans whole San Marzano tomatoes, chopped 

Preparation

Heat olive oil in a large saucepan over medium heat. Add onion, pork, and pepper flakes; cook, stirring, until meat is cooked through and onions are soft and beginning to brown, about 15 minutes. Season with salt and add tomato paste and cook, stirring, 5 minutes more.

Add canned tomatoes and bring to a boil; immediately reduce to a simmer and cook, stirring occasionally, for 35 minutes.