Giada's "House" Soup | Umami

Ingredients

• 2 tablespoons extra-virgin olive oil, plus more for drizzling
• 1 leek, white and tender green parts only, finely chopped
• 2 carrots, 1 finely chopped, 1 sliced
• 1/2 fennel bulb, finely chopped
• Kosher salt
• 1/2 teaspoon red pepper flakes
• 3/4 cup dried small white beans, such as navy
• 1/2 to 3/4 cup farro
• 1 15-ounce can diced tomatoes
• 2 quarts chicken stock (homemade or low-sodium)
• 2 to 3 sprigs thyme
• 1 2-inch piece parmesan cheese rind
• 13 ounces turkey or Polska kielbasa, cut into half-moons
• 4 to 5 large leaves Tuscan kale, ribs removed, chopped (about 2 cups)
• Grated parmesan cheese and fresh lemon juice, for serving (optional)