Minestra di Verdure

Name: Minestra di Verdure
Cuisine: European, Italian, Mediterranean
Ingredients: One 15-oz. can cannellini beans, drained; 2 Tbsp. extra-virgin olive oil, plus more for serving (optional); 8 oz. celery root, peeled and cut into ½-in. pieces (about 2 cups); 8 oz. red kuri squash, peeled and cut into ½-in. pieces (about 1⅔ cups); 4 medium carrots, peeled and cut into ½-in. pieces; 3 medium zucchini, cut into ½-in. pieces; 2 medium leeks, tops and bottoms discarded, cleaned and coarsely chopped; 2 medium turnips, cut into ½-in. pieces; ¼ large fennel bulb (3 oz.), coarsely chopped; 1 Tbsp. tomato paste; Kosher salt and freshly ground black pepper