Crumble the feta cheese into a small blender and add in the lemon zest, Greek yoghurt, and 2 tablespoons of olive oil (reserve the rest for the chickpeas). Blend until smooth and set aside,
Toast the 2 pieces of sourdough. Cut the garlic in half and rub each slice of toast with the cut side of the garlic halves. Once you've done this, grate the garlic.
In a medium frying pan or casserole dish, heat the remaining 2 tablespoons of oil over a medium heat. Add the chickpeas and stir every now and then for 3-4 minutes. Add in the garlic, smoked paprika and ground cumin. Stir well and cook for another 2 minutes. Add your washed spinach to the pan (it's good if it has a little water on the leaves and you want a little moisture) and pour in the tablespoon of sherry vinegar. Pop on the lid and leave for a couple of minutes.
Put your sourdough toast (that's been rubbed with garlic) onto 2 serving plates and spread on the whipped feta cheese.
Give the spinach and chickpea dish a few stirs, and when the spinach is wilted, spoon it on top of the whipped feta and toast. Drizzle with a little olive oil and serve.
Notes
Instead of spinach, courgette also works well in this dish, complementing the salty/zesty feta and the smokiness of the chickpeas. The courgette will need more cooking than the spinach. Allow 3-4 minutes for the courgette to soften slightly but still retain some bite.
If you love whipped feta, like I do, then you should also try my courgette and feta fritters which I serve together with whipped feta.
Try this dish with other beans and legumes. It would be great with butter beans or cannellini beans as well. Just use a can of the beans in the same way as the chickpeas.