Open 1 can and together with the liquid in the can, mash the beans to a pulp. This provides the creamy thickness to the soup. Reserve.
Drain the other cans of their liquid.
Heat the oil in a pot and add crushed garlic, or garlic paste. Gently sauté the garlic for a few minutes.
Add the mashed beans, and gently toss in the garlic mixture. Then add the whole beans and Cook for a minute or two to let the flavours combine .
Add 3 cups of stock, together with the rosemary, a pinch of chilli flakes and season to taste with salt and pepper.
Allow to simmer for 10 minutes or so and you are ready to go.
Serve with your favourite bread or croutons.
Slow Roasted Garlic Paste recipe https://www.shadesofcinnamon.com/slow-roasted-garlic-paste-and-the-revival-of-bygone-practices/