Chestnut and Kale Soup

Ingredients

• 1/2 lb dried white beans such as cannellini, Great Northern, or navy (about 1 1/4 cups), picked over and rinsed
• 1/4 lb thinly sliced pancetta, chopped
• 1 large onion
• 3 garlic cloves, finely chopped
• 3 tbsp extra-virgin olive oil
• 1 (14-oz) can whole tomatoes in juice, drained, reserving juice, and chopped
• 3 1/2 cups low-sodium chicken broth
• 2 cups water
• 1 piece Parmigiano-Reggiano rind
• 1 1/2 tsp salt
• 1/4 tsp black pepper
• 1/2 lb kale, stems and center ribs discarded and leaves torn into bite-size pieces
• 2 tsp fresh chopped thyme