Zuppa di Orzo e Fagioli (Bean and Barley Soup)

Ingredients (11)

• + ½ pound pearl barley add to pantry
• + 2 tablespoons extra-virgin olive oil add to pantry
• + 2 ounces pancetta bacon, diced add to pantry
• + ¾ onion, chopped add to pantry
• + 1 carrot, chopped add to pantry
• + 1 stalk celery, chopped add to pantry
• + 2 (15 ounce) cans cannellini beans, drained and rinsed, divided add to pantry
• + water to cover add to pantry
• + 2 teaspoons salt add to pantry
• + 1 teaspoon freshly ground black pepper add to pantry
• ✓ 1 sprig fresh rosemary