Place a Dutch Oven or large saucepan over medium-high heat. Add oil and then Italian Sausage and saute, breaking sausage apart, until nearly cooked through, 2 to 3 minutes. Add onions, carrots and Italian seasoning and saute until onion softens, 2 to 3 minutes more.

Add tomatoes (including their liquid), stock, kale and bring to a simmer. Reduce heat so the soup maintains a low simmer and continue simmering for 5 minutes to let the flavors come together. While soup simmers, drain and rinse beans and grate parmesan (if not already grated).

Stir beans and into soup and simmer just until beans are heated through. Remove soup from heat and add a squeeze of lemon juice. Taste and add additional salt (I do often find this needs a bit more salt at the end, but that will depend on the natural saltiness of your sausage and stock.)

Divide tortellini into serving bowls. Ladle soup over tortellini (see note). Top with parmesan.