Swiss Chard and Lentil Soup - Lidia

Ingredients

• 4 ounces pancetta, chopped
• 3 garlic cloves, peeled and crushed
• 2 tablespoons extra-virgin olive oil
• 1 large onion, chopped (about 1½ cups)
• 1 medium carrot, peeled and chopped (about ½ cup)
• 1 celery stalk, chopped (about ½ cup)
• One 28-ounce can whole San Marzano tomatoes, crushed by hand
• 2 fresh bay leaves
• 2 tablespoons kosher salt
• 2 bunches Swiss chard, cleaned, tough stems discarded, leaves and tender stems chopped (about 1½ pounds)
• 1 pound dried lentils, rinsed