¼ cup extra-virgin olive oil
3 fat garlic cloves, thinly sliced
3 tablespoons tomato paste
2 (15-ounce) cans white beans (such as cannellini or Great Northern) or chickpeas, drained and rinsed
(opt?) ½ cup boiling water
Kosher salt and black pepper
⅓ pound mozzarella, coarsely grated (about 1 1/3 cups)