Preheat your oven to 375°F.
Dry the chickpeas well and add the to a parchment lined baking sheet. Drizzle with olive oil and coat with salt and pepper. Roast for 25 minutes or until crispy.
While the chickpeas are roasting, put your dutch oven on medium heat. Add in just a drizzle of olive oil and let it warm up, then add the entire tin of anchovies, oil included. The anchovies should fizz a little, but stir constantly until they almost dissolve into an anchovy oil. That's where all the good stuff is.
Add in the garlic and cook for 2 minutes or until it is golden. Then add in the cherry tomatoes, vinegar and basil leaves. Stir to coat in the anchovy oil, then cover and let simmer until the tomatoes burst, about 5-7 minutes.
Use an immersion blender or actual blender to blend this into a smooth soup. Only then do I suggest tasting and seasoning. This will probably need more vinegar as opposed to salt, since anchovies can tend to be very salty. Add hot water as needed to thin the soup out as well.
Remove the chickpeas from the oven when they are crispy.
To serve, add the soup first, a generous scoop of chickpeas, and garnish with any herbs or heavy cream. Add some cracks of black pepper and enjoy!