About 3 tbsp. olive oil, divided
1/2 white onion, chopped
2 garlic cloves, minced
2 medium carrots, chopped into 1/2-in. pieces
2 celery stalks, chopped into 1-in. pieces
1 1/2 qts. chicken broth
1 can (15 oz.) cannellini beans, drained and rinsed
4 whole canned tomatoes*, quartered, plus some juice
2 cups chopped Swiss chard
4 cups rough-textured day-old bread (such as ciabatta), ripped into 1 1/2-in. pieces
Kosher salt and freshly ground black pepper
2 tablespoons chopped fresh basil
2 tablespoons chopped fresh cilantro
Wedge of parmesan cheese for grating (optional)