1Preheat oven/airfryer to 200 degrees Celsius. Season beetroots and garlic bulb with salt, pepper, and olive oil. Cover with foil and roast for 30 minutes until tender.
2Slice the onion and sauté in a frying pan with olive oil until caramelized (10-15 mins).
3Add butter beans and half their liquor, stir well, and cook for 5-10 minutes on low heat.
4Remove beetroot skins and blend with roasted garlic, nutritional yeast, olive oil, and remaining bean liquor until smooth. Season with salt, pepper, and lemon juice.
5Pour the beetroot mixture into the beans and mix well. Check seasoning and cook for a couple more minutes.
6Toast bread and serve the beans in bowls, topped with crumbled feta, parsley, lemon zest, and olive oil.