Heat the oil, if using, in a large pot over medium heat.
Add the onion, celery, garlic, and 1 teaspoon of the rosemary and cook until the vegetables are soft and translucent about 5 minutes. If not using oil, add a few splashes of water as needed to keep ingredients from drying and burning.
Add the tomato sauce, vegetable stock, and chickpeas, and bring to a boil.
Add the kale and after about 5 minutes, add the pasta and stir occasionally. (This assumes your pasta will take 7 to 8 minutes to cook. If you’re using pasta that takes 12 to 15 minutes, add the pasta when you add the kale.)
When the pasta is al dente, remove the soup from the heat and season with salt and pepper.
Garnish with the remaining teaspoon of fresh rosemary and optionally, a drizzle of olive oil.