1 (28-ounce) can whole tomatoes packed in juice
2 tablespoons extra-virgin olive oil, plus more for serving
1 tablespoon butter
3 ounces pancetta or bacon, finely chopped (optional)
1 medium onion, finely diced (about 1 cup)
6 cloves garlic, minced on a microplane grater
1/2 teaspoon dried oregano
1/2 teaspoon dried red pepper flakes
1 quart homemade or low-sodium canned chicken broth
2 (15 ounce) cans dark red kidney beans
2 bay leaves
1 cup small pasta such as shells, ditali, or elbows
Kosher salt and freshly ground black pepper
2 tablespoons chopped fresh parsley leaves