3 1/2 to 4 pounds bone-in country style pork ribs or about 2 to 2 1/2 pounds boneless
kosher salt and freshly ground black pepper
3 tablespoons extra virgin olive oil, divided
1 large onion, chopped or sliced
1 large carrot, diced
2 ribs celery, chopped
3 to 4 medium cloves garlic, finely minced
3/4 cup apple cider
1/4 cup cider vinegar
1 cup chicken broth
2 tablespoons tomato paste
2 bay leaves
1/2 teaspoon dried leaf thyme